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A and B share profits in (7:8). C is admitted for (1/3) share. A and B's new mutual ratio will be (1:1). What is B's sacrifice?

Answer and explanation

Correct answer: (1/5)

Direct answer: Option A, 1/5, is correct. A and B originally share in 7:8, so their old shares are 7/15 and 8/15. C receives 1/3, leaving 2/3 for A and B together. Their new mutual ratio is 1:1, so each receives half of 2/3, which is 1/3. B’s sacrifice is therefore his old share minus his new share: 8/15 − 1/3 = 8/15 − 5/15 = 3/15 = 1/5. Option A is correct. Option B, 1/3, is B’s new share, not his sacrifice. Option C, 2/15, does not follow from subtracting the correct shares. Option D, 1/15, would be the difference between one incorrectly chosen pair of fractions and is not B’s loss. A common mistake is to assume B sacrifices 1/3 merely because C receives 1/3; the incoming share is divided between old partners according to their new mutual ratio. Memory cue: sacrifice = old share − new share.

Related tags

AdmissionNew-RatioHard

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