First slide

Theorems of probability

Question

In a certain town, 40% of the people have brown hair, 25% have brown eyes, and 15% have both brown hair and brown eyes. If a person selected at random from the town has brown hair, the probability that he also has brown eyes is

Moderate

A

1/5
B

3/8
C

1/3
D

2/3

Solution

We have,
$\begin{array}{l} P (A) = \frac{40}{100}, P (B) = \frac{25}{100} and P (A \cap B) = \frac{15}{100} \\ So, P (\frac{B}{A}) = \frac{P (A \cap B)}{P (A)} = \frac{15 / 100}{40 / 100} = \frac{3}{8} \end{array}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App