10th Class Mathematics Probability Question Bank Case Based (MCQs) - Probability

The probability of getting exactly 1 head is:

A) \[\frac{1}{2}\]

B) \[\frac{1}{4}\]

C) \[\frac{1}{8}\]

D) \[\frac{3}{8}\]

Correct Answer: D

Solution :

Let B be the event of getting exactly 1 head.

\[\therefore \,\,\,\,\,\,\,\,B=\{HTT,THT,TTH\}\]

\[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,n(B)=3\]

\[\therefore \] Required probability \[=\frac{3}{8}\]

So, Option [d] is correct.