Question

if a= (q,u,e,s,t,i,o,,n,s)and b=( q,u,e,s,t) find a^-
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Answer 1

If the mean of 9, 11, 13,x, 18, 19 If the mean of 9, 11, 13,x, 18, 19 is x. Find x x. Find x