Acell phone company buys computer chips from a supplier. the supplier sends a shipment containing 3% defective chips. each cell phone uses 3 chips selected independently. what is the probability that all 3 chips will work properly?

The solution for the problem is:

Since the supplier sends a shipment containing 3% defective chips, the probability of selecting a good chip is 97% = .97 

Cancelling for the slight change in percentages when a chip is selected, the chances of selecting 3 good ones in a row is: 
.97 * .97 * .97 = .9127 = 91.27%

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.