The average of 11 numbers is 50 if the average of 1st 6 numbers is 49 and last six numbers is 52 then find out the value of sixth number
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Total of 11 results = 50 × 11 = 550
Sum of first 6 results = 48 × 6 = 288
Sum of last 6 results = 53 × 6 = 318
6th result = (Sum of first 6 results + Sum of last 6 results ) - Total of 11 results
= (288 + 318) - 550 = 56
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