The mean of five number is 30. If one number is exclude,their mean become 28.What is excluded number?
Answers
Answer:38
Step-by-step explanation:excluded no. =5*30-4*28
=150-112
=38
Given :- The mean of five numbers is 30. If one number is excluded, their mean becomes 28. What is the excluded number ?
Solution :-
we know that,
- Mean = (sum of observations)/(Total number of observations)
so,
→ Mean = (sum of observations)/5
→ 30 * 5 = sum of observations
→ sum of observations = 150 .
now, given that, 1 number is excluded .
then,
→ Total numbers = 5 - 1 = 4
→ Mean = 28
therefore,
→ sum of observations = Mean * Total numbers = 28 * 4 = 112 .
hence,
→ Excluded Number = sum of 5 numbers - sum of 4 numbers = 150 - 112 = 38 (Ans.)
∴ The Excluded Number is 38.
Learn more :-
calculate the median and mode from the following income between (rs)100-200 100-300 100-400 100-500 100-600 no of person...
https://brainly.in/question/23585381
Some students of class X donated for the welfare of old age persons. The contributions are shown in the following distri...
https://brainly.in/question/17314012