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Fundamental Principle of Counting

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Question

There are $15$ two bed room flats in a building and $10$ two bed room flats in other building and $8$ two bed room flats in a third building. The number of choices a customer will have for buying a flat is

A

30

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B

33

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C

35

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D

39

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Solution

The correct option is B $33$
The number of choices a customer will have for buying a flat is $15 + 10 + 8 = 33$

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Q. In each question below are four statements followed by two conclusions numbered I and II. You have to take the four given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follows from the four statements disregarding commonly known facts.

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Some rooms are flats.
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Some rooms are flats.
All flats are buildings.
Some buildings are bungalows.
All bungalows are apartments.

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II. Some apartments are buildings.

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Fundamental Principle of Counting

Standard XII Mathematics

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