Question

A box contains 12 transistors, 3 of which are defective. If 3 are selected at random, what is the probability of none of them being defective

Answer 1

Answer:

75%

Step-by-step explanation:

If 3 of 12 are effective, we have a ratio of 1:4 for defective transistors. So if 3 are selected at random, the probability is 75% that none are defective since 1/4 is 25%. Please mark this "brainliest" (the crown) if you like this answer!