Chapter 0.2, Problem 12E

To determine

To calculate:how many way can at least one counter with Side A occur.

Answer to Problem 12E

There are 3 possible way counter with Side A occur.

Explanation of Solution

Given information: Three counters are used for board game.

Therefore, the possibility at least one counter with Side A occur is $C_1^3$ .

Formula used: $C_r^n=\frac{n!}{r!\left(n-r\right)!}$

Calculation: $\Rightarrow C_1^3=\frac{3!}{1!\left(3-1\right)!}$

  $=\frac{3\times 2!}{1\times 2!}=\frac{3}{1}=3$