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The mean of 5 different numbers is 6 and the mean of 4 different numbers is 15. Find the mean of 9 numbers.​ Please answer fast as possible.​
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7 votes
The mean of 5 different numbers is 6 and the mean of 4 different

numbers is 15. Find the mean of 9 numbers.​ Please answer fast as possible.​

User Rakel
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1 Answer

8 votes
Total number of the first five numbers=5*6=30
Total number of the second four numbers=4*15=60
The total number of the 9 numbers=30+60=90
Mean of the 9 numbers=90/9=10
User Mirel Vlad
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