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Lesson 7.4 Probability

Lesson 7.4 Probability. Lesson 7.4 Probability. 1) What is probability?. If a woman were to have a baby in 2008, what is the probability that it would be a boy?. # of favorable outcomes. Probability =. # of possible outcomes. 1. boy. P (boy) =. =. = 50 %. boy or girl. 2.

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Lesson 7.4 Probability

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  1. Lesson 7.4 Probability Lesson 7.4 Probability

  2. 1) What is probability? If a woman were to have a baby in 2008, what is the probability that it would be a boy? # of favorable outcomes Probability = # of possible outcomes 1 boy P (boy) = = = 50 % boy or girl 2 Probability involves predicting future events.

  3. 1) What is probability? Probability is always expressed as fractions (or decimals) between 0 and 1. Probability-future certain impossible

  4. 3) Probability of Single Events a) Simple Events 1 8 Event - Spinning the spinner. 7 2 Outcome - Possible results. 6 3 5 4 # of favorable outcomes Probability = # of possible outcomes Find the probability of each event. 1) P(3) = 3) P(#< 6) = 2) P(even #) = 4) P(composite #) =

  5. 3) Probability of Single Events a) Simple Events A letter is chosen at random from the word ALGEBRA Find the probability of each event. 1 3 1) P(G) = 3) P(A or B) = 7 7 6 2 2) P(A) = 4) P(not E) = 7 7

  6. 3 1 13 13 1 3 4 4 3) Probability of Single Events a) Simple Events A standard deck consists of 52 playing cards. Find the probability of drawing the following. Jack, Queen or King 4 12 = = 1) P(Ace) = 3) P(Face Card) = 52 52 13 39 = = 2) P(Club) = 4) P(not Heart) = 52 52

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