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:



THE ANSWER IS D 8 BECAUSE I DID THE MATH
Answer:
If the bottom of the red triangle is equal to 4 then its
40 mi
if the mi2 in the corner means multiply mi by 2 then 80
If the mi2 in the corner is an exponent then 160