Question

the mean of numbers 20,30,40,x,x+10,70,80,90,is 110.find the missing numbers​

Answer 1

The mean of numbers 20, 30, 40, x, x + 10, 70, 80, 90 is 110. ... Missing numbers are 270 and 280.

Answer 2

Answer:

Step-by-step explanation:

we know that mean=sum of the observations/no. of observations

110=(20+30+40+x+x+10+70+80+90)0/8

110=(340+2x)/8

880=340+2x

2x=540

x=270

x+10=270+10=280

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