Be sure to round answers to at least two decimals The US min

Be sure to round answers to at least two decimals!

The U.S. mint, which produces billions of coins annually, has a mean daily defect rate of 4 coins. Let X be the number of defective coins produced on a given day.

On a given day, what is the probability of more than 3 defective coins?

Solution

The U.S. mint, which produces billions of coins annually, has a mean daily defect rate of 4 coins. Let X be the number of defective coins produced on a given day.

On a given day, what is the probability of more than 3 defective coins?

Poisson distribution used.

Mean =4

P( x >3) = 0.5665

P( x >3) = 0.57 ( two decimals)