Average Practice Test 3

Question : 24 of 40

Marks: +1, -0

If the average marks of three batches of 55, 60 and 45 students is 50, 55 and 60, then average marks of all the students is:

Solution:

Required average Marks

= {55 ×50 +60× 55+ 45 ×60}/{55+60+45}

=8750/160=54.68

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