1 . 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?

• A. 8.7
• B. 30.1
• C. 30.3
• D. 34.6

Answer: Option D

Explanation:

প্রথম number - এর সমষ্টি (40×540×5)  =  200
পরের 2 টি " " " ( 21×2 21×2 )  =  42 
∴∴ 7 টি number - এর সমষ্টি (200   +   42)  =  242
∴∴ 7 টি " " গড়(242÷7242÷7)  =  34.57