Question

A chocolate company selects 50 random packages to check their weight. It finds that 2 packages have an incorrect weight. How many packages out of 2000 should the company predict have an incorrect weight.

Answer 1

80

Explanation:

A company selects 50 random packages from which two of them have an incorrect weight. That is to say: 4% of the packages are incorrrect.

Now if the company selects 2000 packages, we could predict that 4% of them could be incorrect. We know that 2000×0.04 = 80.

Therefore, 80 out of 2000 packages are expected to have an incorrect weight.