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Q:

Two boxes contain 4 and 16 balls respectively. Two balls in the first box and four in the second, are black. If a box is chosen randomly and two balls are drawn at random from it, what is the
probability that at least one ball is black if the ball is not replaced?

A) 11/20 B) 43/120
C) 77/120 D) 9/20
 
Answer & Explanation Answer: C) 77/120

Explanation:

At least one black can be chosen in two ways from each box:
Now, probability of choosing at least one black ball from first box 

= 1/2 × [ (2C1× 2C1)/4C2 + 2C2/ 4C2 ]= 5/12

Probability of choosing at least one black ball from 2nd box
= 1/2 × [(4C1×12C1)/16C2 + 4C2/ 16C2] = 9/40

Final probability

= 5/12 + 9/40 = (50 + 27)/120 = 77/120

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Filed Under: Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams , GATE

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Q:

The newly appointed adviser to Odsha government on public health programmes, K. Srinath Reddy is the receiver of which prestigious civilian award ?

A) Padma Vibushan B) Padma Shri
C) Padma Bhushan D) Bharat Ratna
 
Answer & Explanation Answer: C) Padma Bhushan

Explanation:
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Filed Under: Honours and Awards
Exam Prep: Bank Exams , CAT
Job Role: Bank PO

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Q:

 The process of reading a database schema and producing a data model from that schema is known as:

A) data modeling. B) database design.
C) reverse engineering. D) None of the above is correct.
 
Answer & Explanation Answer: C) reverse engineering.

Explanation:
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Filed Under: Database

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Q:

When is the Anti-terrorism day observed?

A) 23 May 2013 B) 22 May 2013
C) 21 May 2013 D) 24 May 2013
 
Answer & Explanation Answer: C) 21 May 2013

Explanation:

21 May 2013 is observed as Anti terrorism Day on the Death Anniversary of Rajiv Gandhi

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Filed Under: Important Days and Years

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Q:

Which of the following is NOT true about energy balance? 

A) Inactive people use more energy so they should consume fewer calories. B) Energy balance is the balance between the amount of calories consumed and the amount used for energy.
C) Energy balance is influenced by the amount of exercise one gets and their dietary habits. D) Stored body fat will increase if calorie intake is greater than energy used.
 
Answer & Explanation Answer: A) Inactive people use more energy so they should consume fewer calories.

Explanation:

The given statement option A) is False regarding energy balance.
It should be "Inactive people use less energy so they should consume fewer calories."

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Filed Under: General Science
Exam Prep: AIEEE , Bank Exams
Job Role: Analyst , Bank Clerk , Bank PO

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Q:

Mrs. Vijayalakshmi Pandit was

A) Chief minister of a State B) Minister of a State
C) Member of Lok Sabha D) Member of the Rajya Sabha
 
Answer & Explanation Answer: B) Minister of a State

Explanation:
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Filed Under: Famous Personalities

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Q:

What is the fastest of all the birds?

A) Blood phesant B) Swift
C) Sparrow D) None
 
Answer & Explanation Answer: B) Swift

Explanation:

Swift is the fastest among all the birds in India

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Filed Under: Animals and Birds

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Q:

In a vacuum, all electromagnetic waves have the same

A) Velocity B) Wavelenth
C) Frequency D) All the above
 
Answer & Explanation Answer: A) Velocity

Explanation:

When traveling in a vacuum, electronic waves from the electromagnetic spectrum all travel at the same speed. Velocity is speed with direction, so they would all travel at the same velocity, realtively speaking. But frequency and wavelength are quite different.

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Filed Under: Physics
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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