Question

7) If the mean of 80, 55, 60, 85, x, 90, x + 10 is 70, then the value of 'x' is.​

Answer 1

Answer:

if the value of x is 75 then the xis "65

Answer 2

Step-by-step explanation:

SOLUTION

The average (arithmetic mean) of 10, 30, and 50 is 5 more than the average of 20, 40, and

(A) 15

(B) 25

(C) 35

(D) 45

(E) 55

The average of 10, 30, and 50 is .

The average of 20, 40 and x must be 30-5=25, so the sum of these 3 numbers must be 3*25=75 --> 20+40+x=75 --> x=15.