Question

According to a recent survey, 47 percent of the people living in a certain region carry a certain genetic

trait. People from the region will be selected at random one at a time until someone is found who carries
the genetic trait. Let the random variable X represent the number of people selected to find one person
who carries the genetic trait. How many people from the region can we expect to be selected to find one
person who carries the genetic trait?

Answer 1

2.13

Explanation:

.47 is the probability of randomly selecting, you have to find how many trials until successful. x(mean)= 1/.47 to get around 2.13

Answer 2

2.13

Explanation:

.47 would be your probability of randomly selecting but your'e solving geometrically so think how many trials until successful.

use u x(mean)= 1/.47 to get around 2.13