the mean of 20 numbers is 18 if 3 is added to each of the first 10 numbers the mean of the new set of 20 numbers is what give your answer please
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Heya
The mean of 20 numbers is 18.
Sum of 20 numbers is 20×18 = 360
3 is added to each of the first 10 numbers.
Total number added = 3×10=30
New Sum of the numbers = 360+30=390
New Mean = sum of observations/total number of observations
= 390 /20
= 19.5
Hope it helps! ^_^
The mean of 20 numbers is 18.
Sum of 20 numbers is 20×18 = 360
3 is added to each of the first 10 numbers.
Total number added = 3×10=30
New Sum of the numbers = 360+30=390
New Mean = sum of observations/total number of observations
= 390 /20
= 19.5
Hope it helps! ^_^
maxashu:
thnx bro
My pleasure:)
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