Answer to Question #254975 in Statistics and Probability for ady lowe

Question

Charlie tests the light bulbs manufactured in a factory. He found that 3 bulbs out of every 200 bulbs he tested were damaged. If he tested 4,000 bulbs, how many damaged bulbs would he be expected to find?

Answer 1

Expected number: $N=\frac{3}{200}*4000=60.$