Question

The mean of 15 numbers is 38 if one number is excluded,their mean is 35. Find the excluded number

Answer 1

Answer:

X=-10

Step-by-step explanation:

mean=sum of terms÷no of terms

here we don't know sum of numbers ,let assume as X

X÷15=38

X=15×38

X=570

now number excluded then no of terms 16

sum added by X is 570+X

570+X÷16=35

570+X=16×35

570+X=560

X=560-570

X=-10