Question
The average age of a group of persons going for tour to
Shimla is 22 years. 25 new persons with an average age of 10 years join the group and their average age becomes 12 years. The number of persons initially going for tour is?Solution
Initial number of persons = x 22x + (25 x 10) = 12(x + 25) 22x - 12x = 300 - 250 10x = 50 x = 5
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