Question

According to a recent article the average number of babies born with significant hearing loss (deafness) is approximately two per $1,000$babies in a healthy baby nursery. The number climbs to an average of $30$per $1,000$babies in an intensive care nursery. Suppose that $1,000$babies from healthy baby nurseries were randomly surveyed. Find the probability that exactly two babies were born deaf.

On average, for every$25$patient calling in, how many do you expect to have the flu?

Short answer

On average, for every $25$patients calling in, we expect$1$to have the flu.

Step-by-step solution

Introduction 

A series of independent identically distributed Bernoulli trials make up the binomial distribution.

The experiment in a Bernoulli trial is said to be random, with only two possibilities: success or failure.

Explanation 

We may compute the expected value of variable $X$as follows: Since variable $X$has a binomial distribution with $25$trials and a probability of success of $0.04$, we can determine the expected value of variable$X$ as follows:

$25\times 0.04=1$

As a result, we estimate only one flu patient out of every $25$patients that phone in.