Amachine is made of two parts, gizmos and widgets. the probability that a gizmo is defective is 0.20, and the probability that a widget is defective is .25. if a machine is assembled with one gizmo and one widget, what is the probability that the machine will not have any defective parts?

Given that the probability that:
Gizmo is defective is 0.20
widget is defective is 0.25

The probability that:
Gizmo is not defective is 1-0.2=0.8
Widget is not defective is 1-0.25=0.75

If the machine is assembled with only one gizmo and one widget, the probability that the will not have any defective part is:
P(Widget is not defective)*P(Gizmo is not defective)
=0.8*0.75
=0.6

32

step-by-step explanation:

these are your clues: 1. kim ran 18 races2. this was four fewer races than twice thenumber, notice it says twice the number, so you would do the equation 18x2-4; which equals the number 32.thus, 32 is your answer.