Question

A quality control manager at a factory selects 7 light bulbs at random for inspection out of every

400 light bulbs produced. At this rate, how many light bulbs will be inspected if the factory
produces 20,000 light bulbs?

Answer 1

350 lightbulbs

Explanation:

First find the number of batches made.

20,000 divided by 400 = 50

This means that there are 50 batches in which 7 light bulbs will be selected at random to be inspected.

We can multiply the number of batches to the lightbulbs being inspected.

50 times 7 = 350

Therefore, 350 lightbulbs will be inspected.

Please tell me if I am incorrect :)