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JAMB Mathematics 2014 Paper

Question : 39

Total: 47

Numbers	1	2	3	4	5	6
Frequency	18	22	20	16	10	14

Solution:

Concept:

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

Explanation:

“At least a 4” means obtaining a 4, 5, or 6 on the die.

From the table, frequency of 4 is 16, of 5 is 10, and of 6 is 14.

So favourable outcomes

= 16 + 10 + 14 = 40

Total outcomes from 100 throws

= 18 + 22 + 20 + 16 + 10 + 14 = 100

Thus, required probability

= \frac{40}{100} = \frac{2}{5}

Answer:

\frac{2}{5}

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