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Q.

In an exam, the avarage marks obtained by John in English, Maths,  Hindi and Drawing were 50. His average marks in Maths, Science, Social Studies and Craft were 70. if the average marks in all seven subjects is 58. his score in math was

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a

60

b

52

c

50

d

74

answer is D.

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Detailed Solution

Required score in maths = (50x 4 + 70x 4)-(58 x 7)

=(200+280−406)⇒480−406=74

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