Question

The mean of 12,25,10,15,18,11 and x is 15. Find the value of x.

Answer 1

Answer:

sorry I didn't know answer

Answer 2

TO FIND GIVEN,

                         The mean of 12, 25, 10, 15, 18, 11 and x is 15

as we know that the mean formula is an addition of all given numbers are divided by the total numbers.

whereas,

                 ∑x = addition of all the given numbers

                 n = total numbers

           Mean =  ∑x÷n

             $15$ = $\frac{12+25+10+15+18+11+x}{7}$

             $105 = 91+x\\x = 105 - 91\\x = 14$

     ∴ value of x is 14