The average of 6 numbers is 7. The average of three numbers of them is 5. What will be the average of remaining numbers?

A 15
B 30
C 42
D 9

Correct Answer: 9

6 টি নাম্বার এর সমষ্টি ( 6×7) = 42 3 টি নাম্বার এর সমষ্টি ( 3 ×5) = 15  ( - ) বিয়োগ করে,     3 টি নাম্বার এর সমষ্টি = 27  Average = 27/3                 = 9 
Bissoy MCQ
#গণিত #গড় (Average) #Pubali Bank Ltd #জুনিয়র অফিসার ০১. ০৩. ২০১৯

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