Answer:
[tex]\frac{n^{2} }{4}[/tex]
Step-by-step explanation:
We know that the coin has 2 sides, which is tails and heads.
the total number of options is 2. whereas if tails or heads, 1 options
For tails:
[tex](\frac{1}{2}) *n[/tex]
[tex]\frac{n}{2}[/tex]
For heads:
[tex](\frac{1}{2} ) * n[/tex]
[tex]\frac{n}{2}[/tex]
If he does this in a row and expects 1 head and tail:
[tex]\frac{n}{2} * \frac{n}{2}[/tex]
[tex]\frac{n^{2} }{4}[/tex]
