Question
The average number of books sold by Viren in first 5
months is 3000 and in first 6 months is 3800. If the number of books sold by him in 7th month is 30% less than that in 6th month, then find the total number of books sold in the seventh month.Solution
Number of books sold by Viren in first 5 months = 3000 × 5 = 15000 Number of books sold by Viren in first 6 months = 3800 × 6 = 22800 Number of books sold by Viren in 6th month = 22800 - 15000 = 7800 Therefore, number of books sold by Viren in 7th month = 7800 × 0.70 = 5460
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