Question

A teacher designs a test so that 93% of students who study will pass and 9% of students who don't study will pass. 88%

of students study for a test. What is the probability that a randomly selected student passes?

A. 1.057
B. 0.833
C. 0.084
D. 0
E. 0.829

Answer 1

I THINK THE ANSWER IS ALSO E BC I DID THE TEST

Answer 2

Explanation:

First find the percentage of the ones that pass that study

.93 *(88)=88.84%

next find the ones that pass that did not study

.09*(100-88)=1.08

sum these to get the total passing percentage

88.84+1.08=82.92%

The probability is 82.9 per 100 or .8292 for student

E is the answer