# Math Help - Exponential distribution

1. ## Exponential distribution

Let Y be the mean of a random sample of size 36 from an exponential distribution with mean of 3. Approximate P(2.5<Y<4). Please HELP!!!

2. Originally Posted by Patriots326
Let Y be the mean of a random sample of size 36 from an exponential distribution with mean of 3. Approximate P(2.5<Y<4). Please HELP!!!