The mean of age of 5 men is 40 years. three of them are of same age and they are exclude. the mean of the remaining two is 25 age of one of the excluded person in years is?
Answers
Answer:
mean=sum of observations/total no of observations.
mean=40
total no of men=5
hence,sum of observations=40×5=200
3 men are excluded
hence,total no of observations=2
mean of remaining 2=25
hence,sum of remaining 2=25×2=50
sum of observations of excluded 3=200-50=150
mean=150/3=50
Step-by-step explanation:
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Answer:
Mean = Total of observations / Number of observations
Total of observations = Mean X Number of observations
Total of observations = 40 X 5 = 200
Three excluded numbers are same.
Let the excluded number be X, then total of excluded numbers = X + X + X = 3 X
Mean of 2 numbers = 25
Therefore, Total of 2 numbers = 25 X 2 = 50
Therefore, total of excluded numbers = 200 - 50 = 150
3X = 150
therefore X = 150/3 = 50
Age of one of the excluded person in years = 50 years