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
- Salma's average in four tests is 80%. What mark does she need score in her fifth test to make her average 84%?
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- The average of 7 numbers of 40. If 3 more numbers with an average of 21 are added to these numbers,what will be the average of the combined 10 numbers?
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