Question

Alex surveyed his classmates to determine who has been surfing and who has gone snowboarding let a be the event that a classmate has snowboard it and let be be the event that a classmate has served if alex picked a classmate at random what is p(b|a)

Answer 1

B: A and B are independent events because P(A∣B) = P(A) = 0.75.

Explanation:

edg2021

First of all we know they are independent because going surfing does not affect snowboarding and vise versa, they simply do not correlate. And to find if its 75 or 16, we simply find probability of A. A is event of surfing, Probability is favorable/total. So its 225/300. This is 0.75. So the answer is B. (Don't listen to those who say its A, even though they have high ratings. Its simple)

Answer 2

Answer: 3/4

Step-by-step explanation: Given that B is the event occurring and A is the event that has happened, we will use 36/48 as our probability. Once simplifying the numbers, you will get .75 or 3/4.