You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

[EX Q]: Question: Imagine a picture in your mind. There is a rose plant. A few roses have grown up in the plant. There are a few bees hovering over them.
Now read the given statements carefully:
1) If every one of the bees lands on a rose, one of them won't get a rose.
2) If two bees share rise together, then there will be one rose left without any bee.
Can you find out the number of roses on the plant and the number of bees?

 Option A: There are Four roses and four bees.

 Option B: There are three roses and four bees.

 Option C: There are three roses and three bees.

 Option D: There are five roses and one bees.

 Option E: There are six roses and four bees.
[EX A]: Option B

[EX Q]: Question: An article is bought for Rs.675 and sold for Rs.1215, find the gain percent?

 Option A: 33 1/9%

 Option B: 33 8/3%

 Option C: 33 1/3%

 Option D: 33 2/3%

 Option E: 80%
[EX A]: Option E

[EX Q]: Question: A trained covered x km at 40 kmph and another 2x km at 20 kmph. Find the average speed of the train in covering the entire 3x km.

 Option A: 33

 Option B: 77

 Option C: 24

 Option D: 55

 Option E: 88
[EX A]:
Option C