UPSC Civil Services 2014 Prelims General Studies Paper II

Let cost of 1 ticket is R. x.
∴ For A,10=

80

100

×2x
⇒x=

50

8

=

25

4

=6.25‌Rs
Now B gives Rs. 3 to A.
So, A has 13 Rs.
Cost of 2 tickets = 12.50 Rs., which is more than enough to buy 2 tickets.
∴ (a) Rules out
(b) is clearly ruled out
(c) is true, because after buying 2 tickets.
A is left with 13 – 12.50 = 50 paise