Question

Example:
Suppose it is known that in a certain population 10% of the population is color blind. If a random sample of 15 people is drawn from this population, find the probability that

( a ) exactly three are color blind.
( b ) more than two are color blind.
( c ) at least two are color blind.
( d ) none is color blind.
( e ) three to five (inclusive) are color blind.

What is the mean number of color-blinded people? What is the standard deviation?​

Answer 1

Answer:

c or d, (this is a random sample and 1.5 is the average)

Step-by-step explanation:

First, the percentage of the colur blind population is 10%

Second step:

So, if the amount of population in the area was 100 then the colour blind bois will be 10.

Third Step

Use Unitary Method.

If 100 (population)  = 10 (Color Blind Bois)

then 15 (population)  = x (Color Blind Bois)

x = (10 * 15)/100

x= 1.5 people

The mean is 1.5 as in the above Q.

Sorry for that but idk standard deviation. Like the question if it helped. (MARK ME BRAINLIAST PLS) :D