There are 50 students in a class. The average marks of 20 students is 70 and the remaining 30 have average marks of 80. Calculate the average score of the whole class.
Given:
Total strength of class = 50
Average marks of 20 students is 70
Average marks of remaining 30 is 80
Formula Used:
Average =
Solution:
Total marks of 20 students is 20 70 = 1400
Total marks of 30 students is 30 80 = 2400
Total marks of whole class = 1400+2400 = 3800
Average marks =
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