সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?
The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?
- ক. 10
- খ. 8
- গ. 12
- ঘ. 15
সঠিক উত্তরঃ 12
এ সম্পর্কিত আরো প্রশ্ন দেখুন
- The average of 5 numbers is 40. If 2 more numbers with an average of 21 are added to these numbers, what will be the average of the combined numbers?
- The average of three numbers is 7. If 2 of the numbers are zero, then what if the 3rd number?
- Sum of P and Q is 72 and the value of R is 42. What is the average of P, Q and R?
- On Monday a person mailed 8 packages weighting an average of 99/8 pounds and on Tuesday 4 packages weighting an average of 61/4 pounds. What was the average weight on pounds of all the packages the person mailed on both days?
- If the average of four numbers k, 2k + 3, 3k - 5, and 5k + 1 is 63. What is the value of k?
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