railway RRB Technician Grade 1 Mock Test 2024 Quantitative Aptitude Progression Arithmetic Progression
The arithmetic mean of a set of numbers is 12. The mean of another set of numbers is 15. If the combined mean of both sets is 12.5, then what will be the ratio of the frequency of both the groups?
1
3 : 1
2
5 : 1
3
3 : 2
4
5 : 2