A box contains 12 ​transistors, 3 of which are defective. If 3 are selected at​ random, find the probability that None are defective.

Please explain how you get the answer, i know it involves a #C#

Respuesta :

aie4
3 divided by 12 equals 0.25
So we change 0.25 to a fraction which is 1/4
The probability is 1/4