Question

The mean of number 20,30,40,x,x+10,70,80,90is100 find the missing number

Answer 1

Step-by-step explanation:

so the answere is 460 by using mean formula

Answer 2

Answer:

x= 56

Step-by-step explanation:

mean =fi/xi

mean =20+30+40+x+x+10+70+80+90+100/10

mean 100 multiple by 10 = 1000

=440/10

1000-440

560/10=56

x=56