The ratio between the initial investments of P and R is 8:5 respectively.
Let’s assume the initial investments of P and R is 8y and 5y respectively.
The initial investment of P is 20% less than the initial investment of Q.
8y = (100-20)% of initial investment of Q
8y = 80% of initial investment of Q
initial investment of Q = 10y
After ‘t’ months of the start of business, R left it.
Ratio among the investments of P, Q and R with respect to the time = 8yxt+8yx2t : 10yxt+10yx2t : 5yxt
= 8+16 : 10+20 : 5
= 24 : 30 : 5
Here we cannot get the value of ‘t’ from the given information. So the answer cannot be determined.
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