Amy has 20 necklaces in a jewelry box. The probability of reaching into the jewelry box and pulling out a silver necklace is 0.85. What is the probability that Amy will reach in the jewelry box and pull out a necklace that is not silver?

0.15

Step-by-step explanation:

Given

Represent the probability of pulling out silver with p; So:

Required

Determine the probability of not pulling silver

This question is to test probability complements

And the complement rule of probability states that:

Where q and p are opposites. In other words:

q = probability of not pulling out silver

Substitute 0.85 for p in

Make q the subject

Hence, the required probability is 0.15

0.15

Step-by-step explanation:

9 x 8 divided by (5-3)=36