Question

In one large city, 80% of all residents have a motor vehicle, 60% have a bicycle, and 50% have both.

What's the probability that a randomly selected resident has a motor vehicle or bicycle?

Answer 1

The probability of having a motor vehicle is 80%, the probability of having a bicycle is 60%, and the probability of having both is 50% (a half chance).

Probability (motor vehicle or bicycle) = Probability (motor vehicle) + Probability (bicycle) - Probability of both

Probability (motor vehicle or bicycle) = 80% + 60% - 50%

Probability (motor vehicle or bicycle) = 90%

Therefore, the probability that a randomly selected resident has a motor vehicle or bicycle is 90%.

Answer 2

90%

Explanation:

(80% + 60% - 50%)