More about Probability @ yanahv7的部落格

標題:

More about Probability

發問:

1. The probability that it rains today is 0.4. If it rains today, the probability that it will rain tomorrow is 0.65. If it does not rain today, the probability that it will rain tomorrow is 0.2.(a) What is the probability that it will not rain tomorrow?(b) Michael is planning to go for hiking tomorrow. If it... 顯示更多 1. The probability that it rains today is 0.4. If it rains today, the probability that it will rain tomorrow is 0.65. If it does not rain today, the probability that it will rain tomorrow is 0.2. (a) What is the probability that it will not rain tomorrow? (b) Michael is planning to go for hiking tomorrow. If it rains tomorrow, the probability that he will hike in the rain is 0.28. If it does not rain tomorrow, it is certain that he will go for hiking. Find the probability that Michael will go for hiking tomorrow.

最佳解答:

(a) Required probability = 0.4 x (1 - 0.65) + (1 - 0.4) x (1 - 0.2) = 0.62 (b) Required probability = 0.62 + (1 - 0.62) x 0.28 = 0.7264