Find the sum of all. The 11term of an ap whose middle most term.is 30

1.	Find the sum of all. The 11term of an ap whose middle most term.is 30
Answer» We can say that 30 is the Median of 11 terms.thereforewe knowM = (n + 1)/2 th observation for n = oddTherefore the 6th term of this AP is 30Therefore A6 = 30a + 5d = 30therefore we need to find S11Therefore S11 = n/2(2a + (n-1)d)=11/2(2a + 10d)=11/2(2(a + 5d)replacing value=11/2(2(30))=11 * 30=330therefore Answer is 330 330

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