Question

A coin is tossed 1000 times, if the probability of getting a tail is $\frac{3}{8}$ , how many times head is obtained?

Answer 1

No. of times a coin is tossed (n)=1000

Probability of getting a tail =$\frac{3}{8}$

Let No. of tail come =x

Probability P(A) =$\frac{m}{n}=\frac{x}{1000}$

$\therefore \frac{x}{1000}=\frac{3}{8}\Rightarrow x=\frac{3\times 1000}{8}=3\times 125$

$\Rightarrow x=375$

$\therefore$ No. of heads are obtained =1000-375=625