A began business with 12000 and is joined afterwards by B with 72000. When did B join, if the profits at the end of the year are divided equally?
Choose the correct choice.
A) 8 months	B) 9 months	C) 10 months	D) 7 months	E) None of these
Let B join after x months of the start of the business so that B’s money is invested for (12 – x) months.   ∴ Profit ratio is 12 × 12000 : (12 – x) × 72000   or 12 : 6(12 – x)   Since profit is equally divided so   12 =6(12 – x) or x = 10. Thus B joined after 10 months.   Answer 10 months
<result>C</result>
A began business with 12000 and is joined afterwards by B with 72000. When did B join, if the profits at the end of the year are divided equally?