# Binomial Distributions - Anderson School District Five

Binomial Distributions Have a fixed number of trials Each trial has tow possible outcomes The trials are independent The probability of each outcome is constant

Binomial Experiments Suppose a basketball player is shooting free throws. He has hit (H) about 90% of his free throws this season. Use a tree diagram to find the probability that he will

make one of two free throws to win the game. Example Suppose you have n repeated independent

trials, each with a probability of success p and a probability of failure q (with p + q=1). Then the binomial probability of x successes in the n trials can be found by Binomial Probability As part of a promotion, a store is giving away scratch-off cards. Each card has a

40% chance of awarding a prize. Suppose you have five cards. Find the probability that exactly four of the five cards will reveal a prize. Example You can use binomial expansions to find binomial probabilities.

Binomial Theorem ( + ) 5

Expand using the binomial theorem Each hour at a cell phone factory, Quality Control (QC) tests the durability of four randomly selected phones. If more than one fails, QC rejects the entire production for that hour. If in one hour 95% of the phones made are acceptable, what is the probability that QC rejects that hours

phone production? A multiple-choice quiz has five questions. Each question has four answer choices. If you guess every answer, what is the probability of getting at least three correct? Example

Find the probability of x successes in n trials for the given probability of success p on each trial. 1. 2. 3. Find the probability of 2 successes in 4

trials of an experiment if the probability of success of one trial is 0.3 Practice

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