Mathematics

Howell

7 November, 19:51

3. Suppose 60% of the freshmen at your school take a course in compass

navigation. The probability that a freshman selected at random did not get lost

on the class hike is 90%. The probability that a freshman selected at random

took the course and did not get lost is 50%.

a. What is P (did not get lost took the course) ?

P (did not get lost took the course) = P (took the course and did not get lost)

P (took the course)

0.5

b. Kei says P (took the course I did not get lost) is 1. Correct Kei's error.