5b let random variable x represent the number of heads minus the number of tails when a fair coin is tossed 9 times.
what is pr(x=0)?
what is pr(x=3)?
let random variable y represent the number of heads minus the number of tails when a fair coin is tossed 8 times.
what is pr(y=0)?
what is pr(y=3)?

The product of two negative rational numbers is always zero sometimes zero never zero

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?