Suppose n(U) = 150, n(A) = 35, and n(B) = 89.
(a) If n(A U B) = 90, find n(A n B).

34

first of all use formula:

n(AUB)=n(A)+n(B)-n(AnB)

90% rotation

step-by-step explanation:

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.