Question

The mean of 6 numbers is 18. If one number is
excluded their mean becomes 16. Find the
number excluded.​

Answer 1

Answer:

28

Step-by-step explanation:

Let the excluded number be x.

Let the sum of other 5 numbers be y.

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

A/c given : (x+y )/ 6 = 18 - eqn 1

y/5 = 16 -eqn 2

From eqn2, we get y= 16*5= 80

Put y in eqn1, we get

(x+80)/6=18

=> x = 18*6-80 = 108-80 = 28

Thus ans is 28.

Answer 2

Mean = X
18*6=108
New mean X*=16
16*4=64
Excluded number = 108-64=44