Question

A coin is tossed $100$ times with the following frequencies: Head : $20$. Find the probability for event having heads only.

• A. $0.2$
• B. $0.5$
• C. $0.65$
• D. $1.5$

Answer 1

The correct option is A $0.2$

Since the coin is tossed $100$ times, the total number of trials is $100$.

Let us call the events of getting a head and of getting a tail as $X$ and $Y$, respectively. Then, the number of times $X$ happens, i.e., the number of times a head come up, is $20$.

$P\left(X\right)=$ $\frac{\text{Number space of space heads}}{\text{Total space number space of space trials}}$

$=\frac{20}{100}=\frac{1}{5}=0.2$