A certain museum has five visitors in two minutes on average. Let a Poisson random variable denote the number of visitors per minute to this museum. Find the variance of (write up to first decimal place).

The variance is 2.5.

Step-by-step explanation:

Let X = number of visitors in a museum.

The random variable X has an average of  5 visitors per 2 minutes.

Then in 1 minute the average number of visitors is,

The random variable X follows a Poisson distribution with parameter λ = 2.5.

The variance of a Poisson distribution is:

The variance of this distribution is:

Thus, the variance is 2.5.

answer: plz give a pic and answer choices so i can answer!

step-by-step explanation:

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm