Question

A factory robot recently examined some bulbs, of which 2 were flawed and 18 were not. If 30 more bulbs are examined, predict how many will be flawed.

Answer 1

3 bulbs should be flawed

Explanation:

2+ 18 = 20

20 bulbs were examined

2/20 = 1/10 were flawed

looking at the next 30 bulbs

30 * 1/10 = 3

3 of the next 30 bulbs should be flawed