average marks of students in Class 9th, 10th, and 11th are 65% ,60%, and 54% reap. which average marks of students in class 9th, 10th, and 10th and 11th are 63% and 56% reap. find average marks of all students in Class 9th, 10th and 11th.
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(65+60+54)/3
=59.66
the average marks of all students is 59.66
=59.66
the average marks of all students is 59.66
DKKashyap1:
hey
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