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WAEC Mathematics 2012 Paper

Question : 3

Total: 49

Solution:

Concept:

A ratio compares two quantities by dividing them by their common factors.

Explanation:

Enrollment of school X is

1050

Enrollment of school Y is

1190

Find the largest common factor of

1050

and

1190

1050 = 70 \times 15

and

1190 = 70 \times 17

So the common factor is

70

Divide both enrollments by

70

X = \frac{1050}{70} = 15

Y = \frac{1190}{70} = 17

Therefore, the ratio of enrollment of X to Y is

15:17

Answer:

15:17

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