First slide

Theorems of probability

Question

The probability of drawing 3 white and 4 green balls from a bag containing 5 white and 6 green balls if the seven balls are drawn at random simultaneously is

Easy

A

$\frac{5}{11}$
B

$\frac{6}{11}$
C

$\frac{7}{11}$
D

$\frac{8}{11}$

Solution

$n (A) = 5_{c_{3}} {.6}_{c_{4}}, n (S) = 11_{c_{7}}$
$P (A) = \frac{5_{c_{3}} {.6}_{c_{4}}}{11_{c_{7}}} = \frac{5}{11}$

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