A student secures 90% , 60% and 54% marks in test papers with 100, 150 and 200 respectively as maximum marks. The percentage of his aggregate is :
Total mars secured = (90% of 100 + 60% of 150 + 54% of 200)
= `(90/100 xx 100 + 60/100 xx 150 + 54/100 xx 200)`= (90 + 90 + 108) = 288.
Total maximum marks = (100 + 150 + 200) = 450.
`:.` Aggregate percentage = `(288/450 xx 100)`% = 64%.
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