MBA Exam Numerical Ability

Fifty-five stationary articles are to be distributed among pinwala, bookwala and rubberwala in a certain ratio. If no item is broken, which of the following item cannot be the ratio of distribution of the articles among them.

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MBA Other Question

How many words can be formed by using 4 letters at a time out of the letters of the word MATHEMATICS? Two pipes X and Y can fill a tank in 25 hours and 20
hours respectively. Hari opened the pipes X and Y to
fill an empty tank and some times later he closed the
pipes X and Y when the tank was supposed to be
full. After that it was found that the tank was emptied
in 5 hours because an outlet pipe Z connected to the
tank was open from the beginning. If Hari closed the
pipe Z instead of closing pipes X and Y the remaining
tank would have been filled in what time ?