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The average of 25 result is 18. The average of 1st 12 of them is 14 & that of last 12 is 17.Find the 13th result. |
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Answer» Clearly 13th result=(sum of 25 results)-(sum of 24 results) =(18*25)-(14*12)+(17*12) =450-(168+204) =450-372 =78. |
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