Question

Find the probability that one will get 75 marks in the question paper of 100 marks.

• A. $\frac{1}{101}$
• B. $\frac{75}{100}$
• C. $\frac{1}{100}$
• D. $\frac{75}{101}$

Answer 1

Answer: (A)

$\frac{1}{101}$

Here, the marks which can be obtained lies between $0$ and $100$.

$⟹S=\{0,1,2,3,........,100\}$
$\therefore n\left(S\right)=101$
Let $A$ be the event that one can get $75$ marks.
Then, $P\left(A\right)=\frac{n\left(A\right)}{n\left(S\right)}=\frac{1}{101}$

Hence, the answer is $\frac{1}{101}$.