In a class there are 30 students. The average marks of boys is 80 whereas of girls is 70. Find the average marks of the entire class
debtwenty12pe7hvl:
hi ,will u plz check your question once again i think some information is missing with this information no equation can be formed ?
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Average of 70 students = 80.
Hence total marks of all the 70 students = 70x80 = 5600
Out of these 70, average of 40 students = 75
Hence total marks of these 40 students = 40x75 = 3000.
So the total marks of the remaining 30 students = 5600-3000 = 2600
Hence the average of the remaining 30 students = 2600/30 = 86.66
Hence total marks of all the 70 students = 70x80 = 5600
Out of these 70, average of 40 students = 75
Hence total marks of these 40 students = 40x75 = 3000.
So the total marks of the remaining 30 students = 5600-3000 = 2600
Hence the average of the remaining 30 students = 2600/30 = 86.66
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