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 marks obtained by the last student ?
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Answer:
80%
Step-by-step explanation:
Total % marks obtained by 50 students = 50 × 70 = 3500
Total % marks obtained by 25 students = 25 × 60 = 1500
Total % marks obtained by 24 students = 24 × 80 = 1920
% of marks obtained by last student = (3500 - 1500 - 1920) = 80%
Hope it will help you
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