How many buses are required to transport 175 students to the museum?
1. No two buses have the same carrying capacity
2. The average capactiy of a bus is 55 students
I got this seemingly easy DS question wrong. My line of thinking was this:
1. Insufficient
2. 4x55 > 175 so kind of sufficient. However you could have theoreitcal buses that have a max capacity of 1 student, and another with a max capactiy of 109 students. Then you could have 2 additional buses with a capacity of 2 and 108 respectively. With these four buses you would only need the 109 and 108 capacity buses to transport the students. However I realize without the 1 and 2 capacity buses included, the average capacity of the two being used jumps up to 217/2.
I guess my question is when to know when they are asking something super simple vs something that seems super simple but is a 700+ question? Any suggestions and insight would be helpful
1. No two buses have the same carrying capacity
2. The average capactiy of a bus is 55 students
I got this seemingly easy DS question wrong. My line of thinking was this:
1. Insufficient
2. 4x55 > 175 so kind of sufficient. However you could have theoreitcal buses that have a max capacity of 1 student, and another with a max capactiy of 109 students. Then you could have 2 additional buses with a capacity of 2 and 108 respectively. With these four buses you would only need the 109 and 108 capacity buses to transport the students. However I realize without the 1 and 2 capacity buses included, the average capacity of the two being used jumps up to 217/2.
I guess my question is when to know when they are asking something super simple vs something that seems super simple but is a 700+ question? Any suggestions and insight would be helpful
Last edited by parkman on Mon Apr 18, 2011 12:07 pm, edited 1 time in total.
