A group of 1200 persons consisting of captains and soldiers is travelling in a train. For every 15 soldiers there is one captain. The number of captains in the group is

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Question: A group of 1200 persons consisting of captains and soldiers is travelling in a train. For every 15 soldiers there is one captain. The number of captains in the group is
[A].

85

[B].

80

[C].

75

[D].

70

Answer: Option C

Explanation:

Clearly, out of every 16 persons, there is one captain. So, number of captains (1200/16) = 75.

Evaporative cooling process employs a combination of cooling and humidification in which the

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Question: Evaporative cooling process employs a combination of cooling and humidification in which the
[A].

sensible heat is added.

[B].

sensible heat is removed and the latent heat is added.

[C].

latent heat is removed.

[D].

sensible heat is added and latent heat is removed.

Answer: Option B

Explanation:

No answer description available for this question.

A man wears socks of two colours – Black and brown. He has altogether 20 black socks and 20 brown socks in a drawer. Supposing he has to take out the socks in the dark, how many must he take out to be sure that he has a matching pair ?

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Question: A man wears socks of two colours – Black and brown. He has altogether 20 black socks and 20 brown socks in a drawer. Supposing he has to take out the socks in the dark, how many must he take out to be sure that he has a matching pair ?
[A].

3

[B].

20

[C].

39

[D].

None of these

Answer: Option A

Explanation:

Since there are socks of only two colours, so two out of any three socks must always be of the same colour.