Answer:
b
Step-by-step explanation:
Answer:
The probability that exactly one switch is good is

Step-by-step explanation:
The probability that a switch is defective is:

The probability that a switch is not defective is

Therefore, if two switches are selected, the probability that exactly 1 is good is:



Answer:
<h3>A and D </h3>
Step-by-step explanation:
Hope this helps
if its wrong i´m sorry i got my answer from math.way
Answer:
i think it's 15 because if you use 5 and you have to do it by 3 it should be 15