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Maths Puzzle
Numerical Ability
Averages
The average of the salaries of 17 teachers is Rs.45000. 3 teachers went out and the average is dropped by Rs.2500. What is the sum of the salaries of the 3 teachers who left?
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- Rs. 1,70,000
Total salaries of 17 teachers=17x45000=Rs. 765000
Let sum of the salaries of the 3 teachers who left be Rs. x, then
New average of 14 teachers = (765000 - x)/14 = (45000-2500)
=> 765000 - x = 14*42500
=> x = 765000 - 595000 =Rs. 170000 - 7 years agoHelpfull: Yes(0) No(0)
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