Question

the mean of 20 numbers is 20 their sum is

Answer 1

400 May be the answer as
mean=.sum of observation/total number

20=x/20

x=20×20

×=400


hope it helps you

thanks

Answer 2

Mean = (sum of observations)/(no. of observations)

Here,

20 = (sum of 20 numbers)/20



20×20 = sum of observations


400=sum of observations


I hope this will help you
By DEVANSH