Question

The table shows the various outcomes of two different events. In order to find the probability of Outcome Y given that Outcome 2 occurs, what number would you use in the denominator of your fraction when using the formula P(A|B) = n(A and B)/n(B)?

Reference Media Image
Select an answer

A.
30


B.
10


C.
13


D.
15

Answer 1

D. 15

Reason: For P(Y | 2) the denominator n(B) is the total number of outcomes where Outcome 2 occurs (the row total for Outcome 2), which is 15.