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Get Answers to all your Questions
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:
Answers (1)
Total marks of all batches = 55x50 + 60x55 + 45x60
= 55x110 + 60x45
= 6050 + 2700
= 8750
Total number of students = 55 + 60 + 45 = 160
Average marks of all students = 8750/160 = 54.68
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