The bar graph shows average marks scored in a 100 marks Geography exam by students of 7 divisions of Standard X. Study the diagram and answer the following questions.
If all students of Division C got bonus 10 marks for winning the inter-school trophy their new average marks would increase by how much?
Current average marks of all students of Division C = 50
If all students of Division C got bonus 10 marks each, then new average marks = 50+10 = 60
=> Required % increase = $$\frac{(60-50)}{50}\times100$$
= $$10\times2=20\%$$
=> Ans - (D)
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