P and Q enter in to a partnership with P investing Rs. 20,000 and Q investing a certain amount. At the end of first 4 months P withdraws Rs. 4000, and Rs. 6000 at the end of another 5 months. Q remains in the business till the end with the initial investment and receives Rs. 19200 as profit at the end of the year. The total profit at the end of the year is Rs. 38,200. Find the investment of Q.
1). Rs. 8000
2). Rs. 12000
3). Rs. 16000
4). Rs. 18000

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