The given bar-graph shows the number of boys and girls in classes A, B, C and D in a school, and the number of teachers allotted to each class.

Which class has the least percentage of girls?

B

In class A ,

Total strength = 27 + 31 + 8 = 66

Number of girls = 31

Percentage of girls = \(\frac{31 }{66}\) × 100 = 46.96%

In class B ,

Total strength = 35 + 30 + 10 = 75

Number of girls = 30

Percentage of girls = \(\frac{30 }{75}\) × 100 = 40%

In class C ,

Total strength = 30 + 32 + 9 = 71

Number of girls = 32

Percentage of girls = \(\frac{32 }{71}\) × 100 = 45.07%

In class D ,

Total strength = 33 + 34 + 7 = 74

Number of girls = 34

Percentage of girls = \(\frac{34 }{74}\) × 100 = 50%

So , Class B has least percentage of girls.