Subject
Bank Exam
Topic
Pubali Bank Ltd. Junior Officer 2012
The average of 6 numbers is 9, when one number is discarded the average of the remaining numbers becomes What is the discarded number?
The average of 6 numbers is 9, when one number is discarded the average of the remaining numbers becomes What is the discarded number?
ক)
7.8খ)
18গ)
15ঘ)
12.4Explanation
The average of 6 numbers is 9 --> the sum of 6 numbers = (mean)*(number of terms) = 9*6 = 54. The average of 5 numbers is 7.2 --> the sum of 5 numbers = (mean)*(number of terms) = 7.2*5 = 36. The discarded number = 54 - 36 = 18.Related questions
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