First slide

Random variable and probability distribution

Question

Six coins are tossed simultaneously. The probability of getting atleast 4 heads is

Moderate

A

$\frac{11}{64}$
B

$\frac{11}{32}$
C

$\frac{15}{44}$
D

$\frac{21}{32}$

Solution

$P (X = 4) + P (X = 5) + P (X = 6)$
= $[{}^{6}C_{4} + {}^{6}C_{5} + {}^{6}C_{6}] {(\frac{1}{2})}^{6}$
$= \frac{11}{32}$

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