Question

A quality control technician checked a sample of 30 bulbs. Two of the bulbs were defective. If the sample was representative, find the number of bulbs expected to be defective in a case of 450.

36
45
30
24

Answer 1

Answer:

if sample of 30 bulbs has 2 defective bulbs so,

there is one defective bulb every

$\frac{30}{2} = 15$

bulbs.

total defective bulbs in 450 bulbs =

$\frac{450}{15} = 30$