About 9% of the population of a large country is allergic to pollen. If two people are randomly selected, what is the probability both are allergic to pollen? What is the probability at least one is allergic to pollen?

Probability of both people being allergic: 0.81%.

Probability of at least one being allergic: 17.19%

Step-by-step explanation:

If the probability of one person being allergic to pollen is 9%, the probability of two people selected being both allergic is:

0.09 * 0.09 = 0.0081 = 0.81%

The probability of at least one being allergic can be calculated with 1 minus the probability of both not being allergic.

If the probability of being allergic is 9%, the probability of not being allergic is (1 - 0.09) = 0.91 = 91%.

So, the probability of both not being allergic is:

0.91 * 0.91 = 0.8281

Then, The probability of at least one being allergic is:

1 - 0.8281 = 0.1719 = 17.19%

v: l•w•h÷2.

v: 20•6•8 ÷2

v: 960÷2

v: 480