In a group of 42 students, 22 take history, 17 take biology and 8 students took both history and biology. Find the proba...
In a group of 42 students, 22 take history, 17 take biology and 8 students took both history and biology. Find the probability of a randomly selected student
a) Took both biology and statistics?
b)Took biology, but not history?
(In question a. my paper says statistics, it is not part of the given.)
Homework Answers
a) P(a student took both biology and statistics) = Number of students who took both / Total number of students
= 8/42
= 0.1905
b) Number of students who took biology but not history = 17 - 8 = 9
P(a student too biology, but not history) = 9/42
= 0.2143
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