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Q.X and Y were partners in a firm sharing profits in the ratio of 7 : 3. Z was admitted for 1/5th share in the profits which he took 75% from X and remaining from Y. Calculate the sacrificing ratio of X and Y.

CBSECBSE Class XII Board 2020Subjective· 1mImportance★★★★★
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The sacrificing ratio of X and Y is 3 : 1.

Concept: Sacrificing Ratio on Admission of a Partner

When a new partner is admitted, the old partners give up (sacrifice) a portion of their profit share in favour of the incoming partner. The sacrificing ratio measures how much each old partner has surrendered. It determines how the new partner's share of goodwill compensation should be distributed among the old partners.

The sacrificing ratio is calculated as:

Sacrificing Ratio=Old Share−New Share\text{Sacrificing Ratio} = \text{Old Share} - \text{New Share}

for each partner. The partner who sacrifices more receives a larger portion of any premium or goodwill brought in by the new partner.

In this problem, Z is admitted for a specific share, but instead of the old partners sacrificing equally or in their old ratio, Z acquires his share in a specified manner from X and Y. We must first determine how much each old partner sacrifices, then express it as a ratio.


Solution

Step 1: Identify the old profit-sharing ratio

X and Y share profits in the ratio 7 : 3.

  • X's old share = 710\frac{7}{10}
  • Y's old share = 310\frac{3}{10}

Step 2: Determine Z's share and its source

Z is admitted for 15\frac{1}{5} share of the profits.

Z acquires this share as follows:

  • 75% from X
  • Remaining 25% from Y

Step 3: Calculate the sacrifice made by each partner

Z's share = 15\frac{1}{5}

X's sacrifice:

X’s sacrifice=75% of 15=75100×15=34×15=320\text{X's sacrifice} = 75\% \text{ of } \frac{1}{5} = \frac{75}{100} \times \frac{1}{5} = \frac{3}{4} \times \frac{1}{5} = \frac{3}{20}

Y's sacrifice:

Y’s sacrifice=25% of 15=25100×15=14×15=120\text{Y's sacrifice} = 25\% \text{ of } \frac{1}{5} = \frac{25}{100} \times \frac{1}{5} = \frac{1}{4} \times \frac{1}{5} = \frac{1}{20}

Step 4: Express the sacrificing ratio

The sacrificing ratio of X and Y is:

X : Y=320:120\text{X : Y} = \frac{3}{20} : \frac{1}{20}

Multiply both sides by 20 to eliminate the denominator:

X : Y=3:1\text{X : Y} = 3 : 1


Working Notes …

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