前往旅游目的地的往返机票可享受总票价10％的折扣。此外，四人或四人以上的团体可享受总票价5％的折扣。如果单人单程票价为100卢比，则由5名游客组成的团体购买往返机票将收取_________卢比。
(A) 850
(B) 900
(C) 800
(D) 1000答案： (A)
解释：
One way single person fare is 100. Therefore 2 way
is 200.
For 5 persons it is 200 x 5 = 1000
Now 1st discount is of 10 % on total fare, which is
100( 10 % of 1000). And as the group is of more than 4,
an additional discount of 5 % on total fare, which is
50( 5 % of 1000).
Hence total discount is equal to 100 + 50 = 150.
Therefore tickets are charged at Rs 1000 - 150 = 850. 这个问题的测验