In a class of 60 pupils, the statistical distribution of the numbers of pupils offering Biology, History, French, Geography and Additional mathematics is as...

Question 1 Report

In a class of 60 pupils, the statistical distribution of the numbers of pupils offering Biology, History, French, Geography and Additional mathematics is as shown in the pie chart. How many pupils offer Additional Mathematics?

15

10

18

12

20

Answer Details

2x - 24) $^{\circ}$ + (3x - 18) $^{\circ}$ + (2x + 12) $^{\circ}$ + (x + 12) $^{\circ}$ + x $^{\circ}$ = 360 $^{\circ}$

9x = 360 $^{\circ}$ + 18 $^{\circ}$

x = $\frac{378}{9}$

= 42 $^{\circ}$ , if x = 42 $^{\circ}$ , then add maths = $\frac{2 x - 42}{360}$ x 60

= $\frac{2 \times 42 - 24}{360}$ x 60

= $\frac{84 - 24}{6}$

= 10

Read lesson note on Statistics (WAEC)

Statistics

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