t) What is the probability that the student is a male or obtained grade B?

Question

Giving a test to a group of students, the grades and gender are summarized below. If a student is randomly selected from the group, A B C Male 19 11 9 Female 5 6 15

Answer 1

Pr(m or B)= 9/13= about 69% chance male or B student

65 total students

45 =6+39 = B female and male

45/65=9/13