- ABoth statements together are needed (neither alone is sufficient)
- BStatement I alone is sufficient but Statement II alone is not
- CStatement II alone is sufficient but Statement I alone is not
- DEither statement alone is sufficient
Step-by-Step Solution
Each alone is insufficient; together A + B = 60 and (A − 10) : (B − 10) = 2 : 3 give A = 26, B = 34, ratio 13 : 17.
Answer: A) Both statements together are needed (neither alone is sufficient)