Car fare

I take a private car from my house to my office located at the outskirts of the city in the morning and back home in the evening. It costs me 300 rupees everyday. One day the taxi driver informed me that there are two students who wish to go to their college every day in the morning along with me! Their get-in point is exactly halfway between my house and office. Their college is adjacent to my office. On the first day I told them, "If you tell me the mathematically correct price that each one of you should pay for your portion of the trip, I

will let you travel free along with me." How much should the individual student pay for his journey?

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