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Question

Three friends X, Y and Z started a business by investing a sum of money in the ratio of 6 : 3 : 5. After 6 months, X withdraws half of his capital. If the sum invested by Z is ₹12,000, then out of a total annual profit of ₹69,000, what is the difference between X's and Y's profit?

The correct answer is
₹8280

The problem requires calculating the difference in profit between partners X and Y, considering their initial investment ratio, a change in X's capital, and the total annual profit.

Investment Ratio and Initial Capital

The initial investment ratio of the three friends X, Y, and Z is given as $6:3:5$.

We are given that Z's investment is ₹12,000. Since Z's share in the ratio is 5 parts, we can determine the value of one part:

  • Value of 1 part: $1 \text{ part} = \frac{₹12,000}{5} = ₹2,400$
  • X's initial investment (6 parts): $X_{\text{initial}} = 6 \times ₹2,400 = ₹14,400$
  • Y's investment (3 parts): $Y_{\text{initial}} = 3 \times ₹2,400 = ₹7,200$

Profit Sharing Ratio Calculation

Profit is distributed based on the investment amount and the duration. The total profit is annual (12 months).

  • X's Profit Share: X invested his full capital for the first 6 months and then withdrew half (invested $\frac{1}{2}$ of his capital for the remaining 6 months).
    X's effective investment ratio for the year is calculated considering time: $(6 \text{ months} \times 6 \text{ parts}) + (6 \text{ months} \times \frac{6}{2} \text{ parts}) = (6 \times 6) + (6 \times 3) = 36 + 18 = 54 \text{ (capital-time units)}$
  • Y's Profit Share: Y invested his capital for the entire 12 months.
    Y's effective investment ratio for the year is: $12 \text{ months} \times 3 \text{ parts} = 36 \text{ (capital-time units)}$
  • Z's Profit Share: Z invested his capital for the entire 12 months.
    Z's effective investment ratio for the year is: $12 \text{ months} \times 5 \text{ parts} = 60 \text{ (capital-time units)}$

The ratio for profit sharing is $X:Y:Z = 54:36:60$.

To simplify this ratio, we divide each term by their greatest common divisor, which is 6:

$ \frac{54}{6} : \frac{36}{6} : \frac{60}{6} = 9:6:10 $

The final profit sharing ratio is $9:6:10$.

Individual Profit Calculation

The total annual profit is ₹69,000.

The sum of the parts in the simplified profit sharing ratio is $9 + 6 + 10 = 25$.

  • X's Profit: $ \text{X's Profit} = \left(\frac{9}{25}\right) \times ₹69,000 $ $ \text{X's Profit} = 9 \times ₹2,760 = ₹24,840 $
  • Y's Profit: $ \text{Y's Profit} = \left(\frac{6}{25}\right) \times ₹69,000 $ $ \text{Y's Profit} = 6 \times ₹2,760 = ₹16,560 $

Final Profit Difference

The question asks for the difference between X's profit and Y's profit.

$ \text{Difference} = \text{X's Profit} - \text{Y's Profit} $ $ \text{Difference} = ₹24,840 - ₹16,560 = ₹8,280 $
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Important Questions from Partnership

  1. Three partners X, Y and Z started their business by investing ₹40,000, ₹38,000 and ₹30,000, respectively. After 6 months, X and Z made additional investments of ₹20,000 and ₹15,000 respectively, whereas Y withdrew ₹8,000. Find the share of Y (in ₹) in the total profit of ₹38,880 made at the end of the year.

  2. A, B and C invested their capitals in the ratio 2 ∶ 3  ∶ 5. The ratio of months for which they invested is 4 ∶ 2 ∶ 3, respectively. If the difference between the profit shares of A and B is Rs. 1,86,000, then C's share of profit (in Rs.) is:

  3. A started a business with a capital of Rs. 54,000 and admitted B and C after 4 months and 6 months, respectively. At the end of the year, the profit was divided among the three in the ratio 1 ∶ 4  ∶ 5. What is the sum (in Rs.) of the capitals invested by B and C?

  4. A, B and C started a business in partnership. Initially, A invested Rs. 29,000, while B and C invested Rs. 25,000 each. After 4 months, A withdrew Rs. 3,000. After 2 more months, C invested Rs. 12,000 more. Find the share of C( in Rs.) in the profit of Rs. 33,200 at the end of the year.

  5. A, B and C invest in a business in the ratio 4 ∶ 5 ∶ 7. C is a sleeping partner, so his share of profits will be half of what it would have been if he were a working partner. If they make Rs 36,000 profit of which 25% is reinvested in the business, how much does B get (in Rs)?

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