Math, asked by shivani03062003, 1 year ago

Pls help me with this pls help now tom i have my exam

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Answered by kingvivek

x=7
the mean of three observation is 9

shivani03062003: But how did u get the ans pls send me the steps

kingvivek: shivani there is five term so nth observation is 3rd hence x+4=11 therefore x = 7 and the mean of three term is of 2nd term by formula n+1/2 since x+2 is 2nd term so x =9

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