There is a stack of 10 cards, each given a different number from 1 to 10. suppose we select a card randomly from the stack, replace it, and then randomly select another card. what is the probability that the first card is an odd number and the second card is greater than 8?

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Atemperature of 1.64◦f corresponds to answer in units of ◦c.

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.