Study the given information carefully and answer the question. The revenue of a railway zone was collected through Online Ticket Sales, Offline Ticket...

Study the given information carefully and answer the question.

The revenue of a railway zone was collected through Online Ticket Sales, Offline Ticket Sales, Freight, and Fines during 3 Financial Years (FY 2013-14, FY 2014-15, FY 2015-16).

• FY 2013-14: Total revenue was ₹3500 crore. Fines (₹X crore) made up $\frac{6}{7}$ of the total revenue, and revenue from online ticket sales was ₹(X + 300) crore. Revenue from freight was 12% more than offline ticket sales.

• FY 2014-15: Revenue from online ticket sales increased by ₹25 crore compared to FY 2013-14. Offline ticket sales revenue was 40% of the total revenue. Revenue from freight and fines were in the ratio 5:1.

• FY 2015-16: Revenue from fines in FY 2013-14 was $\frac{11}{16}$ of that in FY 2015-16. Revenue from online ticket sales increased by 50% over FY 2014-15, and offline ticket sales revenue was the average of FY 2013-14 and FY 2014-15. Freight revenue increased steadily by ₹250 crore every year.

Question: If the average cost of a railway ticket was ₹300 in FY 2014-15, how many passengers travelled by railways in FY 2014-15? (in crore)