Question

Expected number of heads when we toss $n$ unbiased coins is

• A. $2n$
• B. $n$
• C. $\frac{n}{2}$
• D. $\frac{n}{4}$

Answer 1

The correct option is C $\frac{n}{2}$

Expected number$=\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+.........n$times $=\frac{n}{2}$