Sally has two coins. the first coin is a fair coin and the second coin is biased. the biased coin comes up heads with probability .75 and tails with probability .25. she selects a coin at random and flips the coin ten times. the results of the coin flips are mutually independent. the result of the 10 flips is: t, t,h, t,h, t,t, t,h, t. what is the probability that she selected the biased coin?

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)