X, Y and Z started a business in a partnership in the ratio: 7/2, 4/3, 6/5. If after 4 months, X increases his share 50%. What is Y's share in the profit if the total profit calculated at the end of year is 21,600 ?

Rs 2000

Rs 3000

Rs 4000

Rs 5000

Ratio of the initial investment = 7/2 : 4/3 : 6/5 = 105 : 40 : 36 From this ratio, we can assume that actual initial investments of X, Y and Z are 105x, 40x and 36x respectively X increases his share 50% after 4 months. Hence the ratio of their investments = (105x * 4) + (105x * 150/100 * 8) : 40x * 12 : 36x : 12 = 105 + (105 * 3/2 * 2) : 40*3 : 36 * 3 = 105 * 4 : 40 *3 : 36 * 3 = 35 * 4 : 40 : 36 = 35 : 10 : 9 Y's share = total profit * (10/54) = 21,600 * 10/54 = 4000

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