Subject
Quantitative Aptitude
Topic
Average
The average age of 30 students is 10 years and that of another group 5 of them is 14 years. What in the average age of the remaining students?
The average age of 30 students is 10 years and that of another group 5 of them is 14 years. What in the average age of the remaining students?
ক)
8 yearsখ)
10 yearsগ)
12 yearsঘ)
9.2 yearsExplanation
30 জন শিক্ষার্থীর বয়সের সমষ্টি = (30 x 10) = 300 বছর 5 জন শিক্ষার্থীর বয়সের সমষ্টি = (5 x 14) = 70 অবশিষ্ট 25 জন শিক্ষার্থীর বয়সের সমষ্টি = (300 - 70) বছর = 230 বছর অবশিষ্ট 25 জন শিক্ষার্থীর বয়সের গড় = (230/25) বছর = 9.2 বছরRelated questions
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