Question
The average presence of students of a class in a College
on Monday, Tuesday and Wednesday is 32 and on the Wednesday, Thursday, Friday and Saturday is 30. If the average number of students on all the six days is 26 then the number of students who attended the class on Wednesday is?Solution
ATQ, we can say that Sum of the presence of students on Monday, Tuesday and Wednesday = 3 × 32 = 96 Sum of the presence of students on Wednesday, Thursday, Friday and Saturday = 4 × 30 = 120 Sum of the presence of students of all six days is = 6 × 26 = 156 ∴ Presence of students on Wednesday = (96 + 120) – 156 = 60
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