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WAEC Mathematics 2017 Paper

Question : 32

Total: 49

Solution:

Concept:

Probability of independent events with replacement.

Explanation:

Total bottles

= 8 + 12 + 4 = 24

Probability that the first bottle is Coke

= \frac{8}{24} = \frac{1}{3}

Since the bottle is replaced, the second draw has the same total.

Not Coke means Fanta or Sprite:

12 + 4 = 16

bottles.

Probability that the second bottle is not Coke

= \frac{16}{24} = \frac{2}{3}

Required probability

= \frac{1}{3} \times \frac{2}{3} = \frac{2}{9}

Answer:

\frac{2}{9}

Option C.

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