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Probability Key

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You are given a standard deck of 52 playing cards, which consists of 4 suits: diamonds, hearts, clubs, and spades. Each suit has 13 cards as follows: ace, deuce, trey, four, five, six, seven, eight, nine, ten, jack, queen, and king. The jacks, queens and kings are picture cards. There are no joker cards in a standard deck. There is four of a kind, one in each suit.

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The First Law of Probability : the results of the first trial of a chance event do not affect the results of later trials of the same event. In other words, no matter how many times a flipped coin lands on tails, every flip still has a ½ chance of tails.

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What is the probability of picking a spade from a full deck of cards? 52 playing cards 4 suits 13 cards in each suit

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What is the probability of picking a spade from a full deck of cards? 13/52 =.25 = 25% 52 playing cards 4 suits 13 cards in each suit

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What is the probability of picking an ace from a full deck of cards? 52 playing cards 4 suits 13 cards in each suit

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What is the probability of picking an ace from a full deck of cards? 4/52 =.076 52 playing cards 4 suits 13 cards in each suit

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What is the probability of picking a card with a face value less than five? 52 playing cards 4 suits 13 cards in each suit

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16/52 =.31 = 31% 52 playing cards 4 suits 13 cards in each suit What is the probability of picking a card with a face value less than five?

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52 playing cards 4 suits 13 cards in each suit jacks, queens and kings are picture cards What is the probability of picking a picture card?

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52 playing cards 4 suits 13 cards in each suit jacks, queens and kings are picture cards What is the probability of picking a picture card? 12/52 =.23 = 23%

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What is the probability of a family having a baby boy?

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What is the probability of a family having a baby boy? 1/2 =.50 = 50%

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What is the probability of a family having a second baby boy?

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What is the probability of a family having a second baby boy? 1/2 =.50 = 50%

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. What is the probability of rolling a six when one die is rolled?

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. What is the probability of rolling a six when one die is rolled? 1/6 =.17 = 17%

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What is the probability of rolling a sum of 9 when two dice are rolled?

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What is the probability of rolling a sum of 9 when two dice are rolled? 4/12 = 1/3 =.33 = 33%

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Second Law of Probability: The probability of two or more independent events occurring together is the product of their separate probabilities. In other words, if there is a 50% (1/2) chance of a couple having one boy, there is a 1/2X1/2X1/2X1/2 chance or 1/16 chance of a couple having 4 boys.

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Second Law of Probability: The probability of two or more independent events occurring together is the product of their separate probabilities. What is the probability of obtaining two fours in the random tossing of a pair of dice?

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Second Law of Probability: The probability of two or more independent events occurring together is the product of their separate probabilities. What is the probability of obtaining two fours in the random tossing of a pair of dice? 1/6 x 1/6 = 1/36 =.028 = 2.8%

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Second Law of Probability: The probability of two or more independent events occurring together is the product of their separate probabilities. What is the probability of obtaining a six and a three in the random tossing of a pair of dice?

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Second Law of Probability: The probability of two or more independent events occurring together is the product of their separate probabilities. What is the probability of obtaining a six and a three in the random tossing of a pair of dice? 1/6 x 1/6 = 1/36 =.028 = 2.8%

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What is the probability of winning the Texas lottery?

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What is the probability of winning the Texas lottery? 1/50 x 1/49 x 1/48 x 1/47 x 1/46 x 1/45 ….. According to Ask Jeeves: The number of combinations of 6 items taken from a pool of 50 is:15,890,700 Only 1 of these will be the winning combination, So you have 1 chance in 15,890,700 of winning with a single lottery ticket. Therefore, the probability is 1/15,890,700 or about 0.000000063.

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What is the probability that two fraternal twins ( twins resulting from two eggs and two sperm) will both be girls?

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What is the probability that two fraternal twins ( twins resulting from two eggs and two sperm) will both be girls? 1/2 x 1/2 = 1/4 =.25 = 25%

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What is the probability that two identical twins will both be girls?

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What is the probability that two identical twins(twins resulting from one egg and one sperm) will both be girls? 1/1 x 1/1= 1/1 = 1 = 100%

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What is the probability that two identical twins will consist of one boy and one girl?

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What is the probability that two identical twins will consist of one boy and one girl? 0/1 x 0/1 = 0 = 0%

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Third Law of Probability: The probability that either of two mutually exclusive events will occur is the sum of their separate probabilities.

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What is the probability of rolling a one or a two in a single toss of a die? How many sides to a die? Third Law of Probability: The probability that either of two mutually exclusive events will occur is the sum of their separate probabilities.

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What is the probability of rolling a one or a two in a single toss of a die? One die has six sides. 1/6 + 1/6 = 2/6 = 1/3 =.33 = 33% Third Law of Probability: The probability that either of two mutually exclusive events will occur is the sum of their separate probabilities.

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What is the probability of rolling a total of two or a total of twelve with a pair of dice? Third Law of Probability: The probability that either of two mutually exclusive events will occur is the sum of their separate probabilities.

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What is the probability of rolling a total of two or a total of twelve with a pair of dice? 1/6 x 1/6 = 1/36 + 1/6 x 1/6 = 1/36.056 = 5.6 % Third Law of Probability: The probability that either of two mutually exclusive events will occur is the sum of their separate probabilities.

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