engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Quantitative Aptitude Average
The average age of 5 sisters is 20 years. If the age of the youngest sister be 4 years, then what was the average age of the group of sisters at the time of birth of the youngest sister?
1
20 years
2
15 years
3
18 years
4
25 years