Question

The table shows the frequency distributionof grades obtained by $120$ students.The data is represented in the following pie chart. Which sector is incorrectly labelled ?

• A. A
• B. B
• C. C
• D. D

Answer 1

Answer: (C), (D)

D
C

If whole pie chart is ${360}^{\circ }$=$120students$

Then A=$\frac{60}{360}\times 120=20$

B=$\frac{150}{360}\times 120=50$

C=$\frac{136}{360}\times 120=136/3$

D=$\frac{20}{360}\times 120=20/3$

C&D are incorrectly labelled