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Published byCameron Robbins Modified over 8 years ago
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Bell Ringer At a pet store there are 4 fish, 3 cats, 7 dogs, and 2 turtles for sale. 1) What is the probability that someone would take home a fish? 2) What is the probability that someone would not take home a turtle? 3) What is the probability that someone would take home a spider?
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Today’s Agenda 1. Bell Ringer/HW 2. Mutually Exclusive Events 3. Inclusive Events 4. Socrative QC 5. Intro to Compound Events
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Single Events When a single event has more than one possible outcome (often shown using the word OR), we must ADD all possible outcomes together. Example) The probability that a single die will roll a 2 or 3 is: 1/6 + 1/6 = 2/6 = 1/3
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Mutually Exclusive Events When a single event has many possible outcomes that can never happen at the same time, they are said to be mutually exclusive. Example #1) Megan wants to roll a 2 or 3. Example #2) David wants to pick a king or queen. Example #3) Laura wants to land on orange or red.
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Inclusive Events When a single event has many possible outcomes that can happen at the same time, they are said to be inclusive. Example #1) Megan wants to roll a 2 or an even. Example #2) David wants to pick a king or a red. Example #3) Laura wants to land on blue or a primary color.
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Socrative Quick Check #1 The letters in the word PHILADELPHIA are placed in a hat. P(the letter D or a vowel) =
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Socrative Quick Check #2 The letters in the word PHILADELPHIA are placed in a hat. P(the letter H or a consonant) =
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Compound Events When one event is followed by a second event, they are said to be compound events (often shown with the word AND or THEN). In these situations, we MULTIPLY their individual probabilities to find the total probability. Example: Landing on Heads then TAILS ½ * ½ = ¼
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What’s Your Grade? Green = A(1) Blue = B(2) Yellow = C(3) Orange = D(2) Red =E(1)
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