If X is an exponential random variable with a mean of 5 units. A new random variable Y is defined as follows: Y XX = > [ | 5] Find the pdf of Y and the mean of Y.

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of