MBA Exam

Chikloo buys 10 pens and sells 8 of then at the cost price of 10 pens . Net profit or loss?

1) 10
2) 25
3) none
4) 15

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MBA Other Question
There were five people A,B,C,D and E in a room . Each carrying individual unique ipods.All the ipods were collected and placed on a table. The light was turned off and A was asked to pick up an ipod. He takes an ipod and leaves. Lights are turned on and successively the participants B to E come and take an ipod, they will take up their own ipod if they find it, else take whatever is available and leave the room , each will take only one ipod.What is the probability that the last person will take his own ipod ?

1) 1/3
2) 1/40
3) 2/3
4) 1/2
 Find the number of ordered pairs (x, y) where x and y are positive integers that satisfies the equation

1) 1
2) 2
3) 0
4) infinite