Math1313-Section7.4-Blank

Math1313-Section7.4-Blank - b What is the probability that...

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Section 7.4 – Use of Counting Techniques in Probability 1 Section 7.4 Use of Counting Techniques in Probability Let S be a uniform sample space and let E be any event. Then, P( E ) = ) ( ) ( S n E n Example 1: Consider the experiment of tossing a fair coin 10 times. a. Find the probability that the coin lands heads exactly 7 times. b. Find the probability that the coin lands heads at most 2 times. c. Find the probability that the coin lands tails at least 9 times. d. Find the probability that the coin lands tails at least once.

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Section 7.4 – Use of Counting Techniques in Probability 2 Example 2: In a survey of 35 consumers at a local supermarket, 7 indicated that they buy brand A of a certain product and the rest indicated that they buy brand B of the same product. You choose 5 customers surveyed at random. a. What is the probability that 4 buy brand B and 1 buys brand A?
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Unformatted text preview: b. What is the probability that 3 buy brand A? Example 3: A department store is shipped 100 remote controlled cars of which 6 are defective. A customer selects 7 cars at random. a. What is the probability that at least 5 will be defective? b. What is the probability that at most 4 will be defective? Section 7.4 – Use of Counting Techniques in Probability 3 Example 4: Eight cards are selected at random from a well-shuffled deck of 52 playing cards. a. What is the probability that either 4 face cards or 5 face cards are chosen? c. What is the probability that at least 2 hearts are chosen? Example 5: An urn contains 6 yellow and 8 blue marbles. Five marbles are chosen at random from the urn. What is the probability that at most 4 yellow marbles are chosen?...
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This note was uploaded on 08/30/2010 for the course MATH Math 1313 taught by Professor Abdelnourahmed-zaid during the Fall '10 term at University of Houston.

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Math1313-Section7.4-Blank - b What is the probability that...

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