Solve this Ratio and Proportion question: If a:b = 5:7, find (a+b):(a-b).
Explanation
The verified answer to “Solve this Ratio and Proportion question: If a:b = 5:7, find (a+b):(a-b).” is 6:1, option D. The ratio is typically expressed as 6:1 magnitude. This working identifies the relevant ratio-proportion calculation and connects the given information to the required result. To solve reliably, represent every term, person, seat, letter or operation in the order stated; then apply one rule consistently instead of guessing from the final pair alone. The alternatives Cannot be determined, 12:(-2) = 6:(-1) and 12:2 fail because each breaks at least one stated condition, transition, direction or arithmetic step. A plausible-looking option is not sufficient unless it reproduces the complete ratio-proportion calculation. For independent confirmation, begin with the first clue or term, rebuild each intermediate step, and compare the derived result with all four choices. In a letter series, translate letters into positions A=1 through Z=26 and preserve wraparound. The method is transparent, question-specific and suitable for SSC, Railway, Banking, Defence, State and other competitive examinations.