Question

From a shipment of 250 light-bulbs, a sample of 50 was selected at random and tested. If 10 light-bulbs in the sample were found to be defective, how many defective light-bulbs would be expected in the entire shipment?

Answer 1

240

Answer 2

All they did was just make a sample and check.

Only 10 were bad.

240 were shipped. It's not like they said per 50 lightbubls in each sample


FAN AND GIVE A MEDAL IF THIS HELPED

Answer 3

That's not the right answer.

Answer 4

A.30, B.40, C.75,D.50.

Answer 5

Shouldn't the rate of error in the sample be proportional to the entire shipment?

Answer 6

10/50 = x / 250

Answer 7

I dunno... I tried solving it on my own, and got 50. 1/10= 0.5 ---> 0.5 OR 5x10= 50..?

Answer 8

I tried. :/

Answer 9

Well, thanks for helping!

Answer 10

Good luck, お宅お兄さん

Answer 11

Thanks! :D

Answer 12

Maybe its 40