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JAMB Mathematics 2021 Paper

Question : 22

Total: 40

Solution:

Concept:

Use the ratio of each value to the total sum to find its sector angle in a pie chart.

Explanation:

Find the total sum of all the given numbers.

4 + 16 + 30 + 20 + 10 + 14 + 26 = 120

Identify the numbers that are equal to or greater than

16

These are

16, 30, 20

and

26

Sum of these numbers:

16 + 30 + 20 + 26 = 92

The total angle around the pie chart is

360^\circ

Required angle

= \frac{92}{120} \times 360^\circ

= \frac{92 \times 360}{120}

= 276^\circ

Answer:

276^\circ

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