Question

About 2% of the population has a particular genetic mutation. 1000 people are randomly selected. Find the mean for the number of people with the genetic mutation in such groups of 10

Answer 1

Explanation:

We khow that the genetic mutation affect 2 percent of the population .

Let's try to understand what does this mean :

• in a group of 100 people there is possibility of finding 2 people with this genetic mutation
• in a group of 1000 the possibility raises to 20 people so we can deduce that each time we add a zero we add a zero in 2

so :

• 100⇒2
• 1000⇒20
• 10000⇒200
• 100000⇒2000

and so on