Question

the mean of 5 numbers is 10.2 the mean of the 4 numbers is 10 find the fifth number ​

Answer 1

let sum of 5 no. be x

and sum of 4 no. be y

so 5th no. will be x-y

mean of x no. is 10.2

=x/5=10.2

=x=10.2×5

x=51______ eq.1

mean of 4 no. is 10

y/4=10

y=10×4

y=40 ____eq.2

fifth no. is x-y

from eq.1 and eq.2

fifth no. is 51-40=11

hope it helps buddy

Answer 2

Answer:

it's answer is 11

Bhai which assiassin cred game is best