grade 11 · A2-016

Find a conditional probability

Use only the conditioned group as the denominator and count its overlap with the target event.

Learn togetherFresh problem · seed 1252659011

In the two-way table, what is \(P(A\mid B)\)?

Let's work it out together.

Work through one checkpoint at a time. Your answer area opens after the reasoning.

Checkpoint 1

The condition after the bar restricts the sample space to row B.
Checkpoint 2

Use the B row total as the denominator.
Checkpoint 3

Use the A-and-B overlap as the numerator.

\(\frac{7}{13}\)\(\frac{7}{27}\)\(\frac{19}{27}\)\(\frac{6}{13}\)