Five horses are in a race. Mr.A selects two of the horses

• Probability

Five horses are in a race. Mr.A selects two of the horses at random and bets on them. The probability that Mr.A selected the winning horse is

1. 1/5
2. 2/5
3. 3/5
4. 4/5

Answer

n(S) = ⁵C₂ 

n(E) = ²C₁ + ²C₁

p(E) = n(E)/n(S)

The correct option is B.