u>Example:
A, B and C starts business from 5000 for 1 year, 6000 for 9 months and 3000 for 7 months. They earned profit 3375. Find share of each.
Solution:
Let total profit = 3375
Ratio of Investments
Ratio between their periods
Ratio of investments with respect to time
Sum of ratios = 20 + 18 + 7 = 45
Share of A =  x 3375 = 1500
Share of B =  x 3375 = 1350
Share of C =  x 3375 = 525
Example:
Three partners invested Rs. 16000, 14500 and 10500 respective. The profit was distributed among the partners. If the third partner got Rs. 273 as profit, what was (a) total profit (b) profit of 1st and 2nd partner?
Solution:
Let total profit = P
Let A, B, C be three partners.
Ratio between their partner investments
Sum of ratio = 32 + 29 + 21 = 82
Profit receive by third partner =  x P
273 =  x P
 Total Profit = 1066
Share of 1st partner =  x 1066 = 416
Share of 2nd partner =  x 1066 = 377
Example:
A servant receives house rent allowance  of his basic pay. Medical allowance  of his basic pay. If he receives Rs. 450 as medical allowance, find his total basic pay an his house rent allowance.
Solution:
Let basic pay = 
Let amount received as medical allowance = 450
But medical allowance =  (basic pay)
= 
 = 9000 Rs
 House rent allowance =  x 9000 = 900 Rs
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