railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Average Simple Average
The average monthly income of the father and mother is Rs. 5,000. The average monthly income of the mother and her son is Rs. 6,000. The average monthly income of the father and his son is Rs. 10,000. Find the monthly income (in Rs.) of the father.
1
9000
2
8000
3
12000
4
10000