The mean of seven numbers is 12 if six of them are 513 nine 1714 and 10 then find the seventh number
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sum of observations =7×12=84
sum of 6 numbers(given)=5+13+17+14+10=59
seventh number is =84- 59=25
sum of 6 numbers(given)=5+13+17+14+10=59
seventh number is =84- 59=25
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