Question

Only 7% of the American Population have type O-negative blood. If 10 people appear at random to give blood, what is the probability that at least 1 of them will be O-negative?

Answer 1

Approximately 1 in 10 blood donors will have the `"O"` negative blood type.

Out of 100 blood donors, seven would be expected to have the `"O"` negative blood type.

Explanation:

Convert `7%` to decimal form.

`7/100=0.07`

Multiply the number of blood donors by `0.07`.

`10xx0.07=0.7~~1`