Test Index

BECE Mathematics 2011 Paper

Question : 31

Total: 40

Solution:

Concept:

Probability of an event is the ratio of favourable outcomes to the total number of possible outcomes.

Explanation:

Total balls in the bag

= 10 + 15 = 25

Favourable outcomes for selecting a red ball

= 10

P(\text{red}) = \dfrac{\text{Number of red balls}}{\text{Total balls}} = \dfrac{10}{25}

Simplifying by dividing numerator and denominator by

5

, we get:

P(\text{red}) = \dfrac{2}{5}

Answer:

\dfrac{2}{5}

, which is Option B.

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