Maths-

General

Easy

Question

# A guard of 12 men is formed form soldiers If A and B are three times as often together on guard as C,D, E then =

- 16
- 32
- 64
- 8

## The correct answer is: 32

### Include A,B in 12 = 3 (include C, D, E)

n - 2 C_{10} = 3n - 3 C_{9}

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