Question 865777:
(1 point) Suppose in a city 10% of the people are left-handed, 20% of the people play golf, and 5% of the people are left-handed and also play golf. What is the percentage of people in the city who either play golf or are left-handed? 6.
(1 point) Suppose in a city 10% of the people are left-handed, 20% of the people play golf, and 5% of the people are left-handed and also play golf. If a randomly chosen person plays golf, what is the probability that this person is left-handed? Answer in fraction reduced to lowest terms. 7.
(1 point) Suppose in a city 48% of the people are women, 25% of the women are college graduates, and 20% of the men are college graduates. If a randomly chosen person is a college graduate, what is the probability that this person is a man? Round answer to two places after the decimal point. 8.
(1 point) A box contains 4 red balls and 6 white balls. You draw two balls in succession, without replacement (i.e., the balls drawn are not put back into the box). Use a tree diagram to find the probability that the balls you draw are a white ball followed by a red ball. Answer in fraction reduced to lowest terms. 9.
(1 point) You are given 6 keys, one of them opens a chest. Not knowing which key is the right key, you try them one by one. Find the probability that the third key you try opens the chest. Use a tree diagram to solve this problem. Answer in fraction reduced to lowest terms. (To better understand the problem, find the probability that the fourth key opens the chest, then the fifth key, the sixth key. What is the conclusion?) 10.
(1 point) A fair coin is flipped four times. Given that the first three flips resulted in heads, what is the probability that the fourth flip is tails? (A) 3/4 (B) 1/4 (C) 1/2 (D) 15/16
Answer by edjones(8007)   (Show Source):
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