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In a class of 60 pupils, the statistical distribution of the numbers of pupils offering ...
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Classroom
Mathematics Classroom
Jamb
Topics
Jamb 1983
STATISTICS
Representation Of Data
Pie Chart
Take Free Practice Test On 2024 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
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?
A.
15
B.
10
C.
18
D.
12
E.
20
Show Answer
Show Explanation
Correct Answer: B
Explanation
(2x - 24)° + (3x - 18)° + (2x + 12)° + (x + 12)° + x° = 360°
9x = 360° + 18°
x = \(\frac{378}{9}\)
= 42°, if x = 42°, then add maths = \(\frac{2x - 42}{360}\) x 60
= \(\frac{2 \times 42 - 24}{360}\) x 60
= \(\frac{84 - 24}{6}\)
= 10
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