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Q:

In a box, there are four marbles of white color and five marbles of black color. Two marbles are chosen randomly. What is the probability that both are of the same color?

A) 2/9 B) 5/9
C) 4/9 D) 0
 
Answer & Explanation Answer: C) 4/9

Explanation:

Number of white marbles = 4

Number of Black marbles = 5

Total number of marbles = 9

Number of ways, two marbles picked randomly = 9C2

Now, the required probability of picked marbles are to be of same color = 4C2/9C2  +  5C2/9C2

= 1/6 + 5/18

= 4/9.

 

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Filed Under: Probability
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Q:

On BBC World News channel last night they showed an informative program about new innovations in medical imaging, which you would have found interesting.

A) there was an informative program about innovations in medical imaging, a program you would have found interesting. B) they showed an informative program about innovations in medical imaging, which you would have found interesting.
C) there was an informative program about new innovations in medical imaging, that you would have found interesting. D) they showed an informative program about new innovations in medical imaging, which you would have found interesting.
 
Answer & Explanation Answer: A) there was an informative program about innovations in medical imaging, a program you would have found interesting.

Explanation:

They is incorrect when talking of the television channel.

New is redundant.

And which must have a clear antecedent.

 

Hence, Only Option A satisfies and clears all the flaws in the given sentence.

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Q:

Two persons Shyam and Rahim can do a job in 32 days together. Rahim can do the same job in 48 days alone. They started working together and after working 8 days Rahim is replaced by a third person Ram whose efficiency is half that of Rahim. Find in how many days the remaining work will be completed by both Shyam and Ram together?

A) 16 days B) 72/5 days
C) 15 days D) 96/5 days
 
Answer & Explanation Answer: B) 72/5 days

Explanation:

Work done by Shyam and Rahim in 8 days = 8/32 = 1/4

Remaining work to be done by Shyam and Ram = 1 - 1/4 = 3/4

Given efficieny of Ram is half of Rahim i.e, as Rahim can do the work in 48 days, Ram can do the work in 24 days.

One day work of Ram and Shyam = (1/32 - 1/48) + 1/24 = 5/96

Hence, the total work can be done by Shyam and Ram together in 96/5 days.

 

Therefore, remaining work 3/4 can be done by them in 3/4 x 96/5 = 72/5 = 14.4 days.

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Filed Under: Time and Work
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Q:

Who is known as the Second Law Officer of India?

A) Chief justice of India B) Law minister of India
C) Attorney general of India D) Solicitor general of India
 
Answer & Explanation Answer: D) Solicitor general of India

Explanation:

The Solicitor General of India is the second law officer of the country.

 

The Solicitor General of India is below the Attorney General for India, who is the Indian government's chief legal advisor, and its primary lawyer in the Supreme Court of India.

 

The Solicitor General of India is appointed for the period of 3 years. He assists the Attorney General and is himself assisted by several Additional Solicitors General of India.

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Filed Under: Indian Politics
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Q:

How many black cards are in a deck?

A) 13 B) 26
C) 39 D) 52
 
Answer & Explanation Answer: B) 26

Explanation:

The total cards in the deck are 52. These 52 cards are divided into 4 suits of 13 cards in each suit. Two Red suits and Two black suits.

Red suits :: Heart suit and Diamond suit = 26

Black suits :: Spade suit and Club suit = 26.

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Q:

How many blocks in a mile?

A) 8 - 12 B) 12 - 15
C) 8 - 15 D) 15 - 20
 
Answer & Explanation Answer: D) 15 - 20

Explanation:

About 15 - 20 blocks become a 1 mile. City blocks differ in sizes. They do not have a standard measurement. Every geographical area has its own average city block size.

A city block is a rectangular area in a city with several buildings with the streets around. It is also called "block" which, in a dictionary, is defined as an informal unit of distance from one intersection to the next.

 

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Filed Under: Analytical Reasoning
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Q:

6 choose 3 =

A) 20 B) 30
C) 18 D) 24
 
Answer & Explanation Answer: A) 20

Explanation:

6 choose 3 means number of possible unordered combinations when 3 items are selected from 6 available items i.e, nothing but 6C3.

Now 6C3 = 6 x 5 x 4/3 x 2 x 1 = 120/6 = 20.

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Filed Under: Arithmetical Reasoning
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Q:

The shortest book in number of words?

A) John B) Jude
C) Obadiah D) Philemon
 
Answer & Explanation Answer: A) John

Explanation:
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Filed Under: General Awareness
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