The average marks obtained in a class of 50 students is 70%. The average of first 25 is 60% and that of 24 is 80%. What is the mark obtained by the last student ?
A. 90%
B. 60%
C. 80%
D. 70%
Answer: Option C
Solution(By Examveda Team)
Total Mark obtain by all 50 student = 50 × 70 = 3500Total mark obtain by 1st 25 student = 25 × 60 = 1500
Total mark obtain by next 24 student = 24 × 80 = 1920
Mark obtain by last student = 3500 - (1500 + 1920) = 80
i.e 80% mark obtain by last student.
This Question Belongs to Arithmetic Ability >> Percentage
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