1.

When a number x is added to the set of numbers 5, 7, 8, 12, 6, 10 and 11; the new mean is 9. Calculate the value of x.

Answer»

Step-by-step explanation:

MEAN = 5+7+8+12+6+10+11+X

8

therefore, 9 = 48+x

8

therefore, 72 = 48 + x

x= 72- 48 = 24

therefore, the value of x is 24.



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