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A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half (1/2). The number of pupils in the class is:

A. 10 B. 20
C. 40 D. 73

Read Solution (Total 2)

let x pupils in the class
by question
total increase in marks = x/2
so;x/2 = (83 - 63)
x = 2 * 20
40
answer is 40
11 years agoHelpfull: Yes(4) No(0)

C. 40 pupils in class
12 years agoHelpfull: Yes(2) No(10)

GENPACT Other Question

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is:

A. 53.33 B. 54.68
C. 55 D. None of these Kumar spends 75% of his income. His income is increased by 20% and he increased his expenditure by 10%. Find the percentage increase in his savings.