Question

Hi can someone help me with this

The mean of 6 numbers is 17. Four of the numbers are -15, 17, 20 and 22. The remaining two numbers are each equal to x. Calculate (i) the sum of the 6 numbers, (ii) the value of x.​

Answer 1

I)102

ii) 29

Explanation:

mean:17

N= 6

-15,17,20,22,x,x

Mean=Ex/N

or,17= -15+17+20+22+X+X /6

or, 17= 44+2x / 6

or, 17*6= 44+2x

or, 102-44= 2x

or , 58= 2x

or, X= 58/2

(X= 29)

now,

X=29

-15+17+20+22+29+29=102