Question

13. 30 of the 100 iPads in an inventory are known to be cracked. What

is the probability you randomly select one that is not cracked?

Answer 1

7/10 or 0.7

Explanation:

a probability is always the ratio of possible cases over all cases.

"all cases" here is 100.

possible cases are all iPads not cracked in the inventory = 70 (because 30 are cracked, that leaves 100-30=70 not cracked).

so, the probability to select a non-cracked unit is

70/100 or simplified 7/10 (or 0.7)