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A and B share in old ratio (13:7). C is admitted for (1/4) share and A and B sacrifice equally. What will be A's new share?

Answer and explanation

Correct answer: (21/40)

Direct answer: A’s new share is option A, \(21/40\). The total share admitted to C is \(1/4\). Since A and B sacrifice equally, each sacrifices half of C’s share: \(1/4 \div 2=1/8\). The old ratio 13:7 has 20 total parts, so A’s old share was \(13/20\). Therefore A’s new share is \(13/20-1/8\). Taking denominator 40, this is \(26/40-5/40=21/40\). Option A is correct because it shows this exact balance after sacrifice. Option B, \(19/40\), results from an incorrect subtraction. Option C, \(13/20\), is A’s old share and ignores the sacrifice. Option D, \(1/8\), is only the amount sacrificed by each partner, not A’s new share. Memory cue: first divide the incoming partner’s share equally, then subtract each sacrifice from the old share.

Related tags

Equal SacrificeNew ShareNumerical

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