Question

Michele_Laino

A battery manufacturer randomly tests 500 batteries and finds that 3 are defective.


How many defective batteries would be expected in a shipment of 12,000 batteries?

A.
120

B.
72

C.
60

D.
36

Answer 1

@Michele_Laino

Answer 2

here the relative frequency of defective batteries, is:
f=3/500
now, in order to get your answer you have to multiply that frequency by 12,000

Answer 3

what is:
\[\large \frac{3}{{500}} \times 12000 = ...?\]

Answer 4

72

Answer 5

that's right!

Answer 6

so, what is the right option?

Answer 7

yes :)

Answer 8

it is B