Math, asked by pandapooja2009, 2 months ago

pls send me the answer

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Answered by amoghnasa

0

Mean = Sum of terms/ Nunber of terms

5n/9 = 1+2+3+....+n/n

5n²/9 = n(n+1)/2

5n/9 = (n+1)/2

10n = 9n+9

n = 9

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