Answered

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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.​

Sagot :

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
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