Question

78.2% of the students study more that one day for the chapter test. Find the probability that a randomly selected student did not study more than one day for the test.

A. 0.218 (this one is right)
B. 0.782
C. 0.328
D. 0.391

Answer 1

A

Explanation:

Total is ALWAYS 100%.

It says that 78.2% DO STUDY. It means the REST (100-78.2) DO NOT STUDY.

What is 100 - 78.2 ? It is 21.8%

To get the answer in decimal, we divide by 100:

`(21.8)/(100)=0.218`

Hence, A is the correct answer.