Answer to Question #254425 in Statistics and Probability for Rahima

Question

2- If the probability of a student taking a calculus class is 0.10

, the probability of taking a statistics class is 0.90

, and the probability of taking a calculus class and a statistics class is 0.07

, what is the probability of a student taking a calculus class or a statistics class?

3-A college has buildings numbered from 1

through 60

. What is the probability that a student will have their first class in a building number that is not a multiple of 8?

Answer 1

A.

P(Taking a calculus or Statistics Class)

= P(Calculus) + P(Statistics) - P(Both)

= 0.10 + 0.90 - 0.07

= 0.93

B.

multiple of 8 upto 60 are = 8 , 16 , 24 , 32 , 40 , 48 , 56

multiple of 8 upto 60 are = 7

total number of building = 60

required probability = 53/60