A boy gets 70% of the total marks . He appeared for 4 subjects . If the marks in all subjects are 100 and he gets 81,66 and 68 in three subjects ,how much soes he score in the forth subject
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Total Marks scored in % = 70%
Total Number of subjects =4
Maximum mark in each subject = 100
Grand total mark of 4 subjects = 4x100 =400
He scored 70 % of 400
That is 400x(70/100) = 280
His marks in 3 subjects = 81+66+68 = 215
Therefore mark scored in the 4th subject = 280 - 215 = 65
Total Number of subjects =4
Maximum mark in each subject = 100
Grand total mark of 4 subjects = 4x100 =400
He scored 70 % of 400
That is 400x(70/100) = 280
His marks in 3 subjects = 81+66+68 = 215
Therefore mark scored in the 4th subject = 280 - 215 = 65
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