The average of 6 number is 9 , when one number is discarded the average of the remaining numbers becomes 7.2 . What is the discarded number?
Created: 6 years ago |
Updated: 3 years ago
best des
Total of 6 number is 6×9 = 54
If 1 number is discarded then there are 5 numbers
So, total of 5 number is 5×7.2 = 36
So the discarded number is = ( 54 - 36) = 18
Md Azizur Rahman
Founder of Satt
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