The average age of a group of 10 students was 20. The average age increased by 2 years when two new students joined the group. What is the average age of the group. What is the average age of the two new students who joined the group?

Created: 4 years ago | Updated: 3 years ago

Updated: 3 years ago

22 years

30 years

40 years

32 years

পিএসসি ও অন্যান্য নিয়োগ পরীক্ষা পল্লী কর্ম সহায়ক ফাউন্ডেশন সহকারী ব্যবস্থাপক ০২. ০৮.২০১৯ গণিত শতকরা (Percentage)

ব্যাখ্যা

781

Best Ans:

Total age of 10 students  = 20×10 = 200 
Total age of 12students  = (20  +  2)12 = 264
∴ age of 2 new students  = 264 - 200 = 64
average  = 64/2 = 32

4 years ago

0 0

Md Azizur Rahman

Founder of Satt

শতকরা (Percentage)