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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:

One of the ingredients of the paste on the side of a match box is 

A) Phosphorus pentaoxide B) Phosphorus trichloride
C) Phosphorus trisulphide D) Phosphorus trioxide
 
Answer & Explanation Answer: C) Phosphorus trisulphide

Explanation:

The paste applied to the side of a match box is a mixture of phosphorus trisulphide, glass powder (or sand) to cause friction and glue (binding material)

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Filed Under: Chemistry

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Q:

The head quarters of World Trade Organisation(WTO) are at

A) Rome B) Geneva
C) Doha D) New York
 
Answer & Explanation Answer: B) Geneva

Explanation:
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Filed Under: Indian Economy

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Q:

The roadway linking Mumbai and Agra passes through

A) Nasik and Gwalior B) Pune and Bhopal
C) Badodara and Jhansi D) Jaipur and Kanpur
 
Answer & Explanation Answer: A) Nasik and Gwalior

Explanation:

Thana, Indore and Shivpur are other important junctions on the route.

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Filed Under: Indian Geography

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Q:

What are software interrupts?

Answer

RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.

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Subject: Hardware

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Q:

What is the assigned code name of India first nuclear explosion at Pokran ?  

A) Operation Sakshi B) Operation Hurricane
C) Operation smiling Buddha D) Operation cross road
 
Answer & Explanation Answer: C) Operation smiling Buddha

Explanation:
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Filed Under: General Awareness

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Q:

"Light years" is the unit of _____?

A) Acceleration B) Distance
C) Light Intensity D) Weight
 
Answer & Explanation Answer: B) Distance

Explanation:

A Light-year is a distance that light travels in the vacuum in one Julian year (365.25 days).

The light-year is a unit of length used to express astronomical distances. It is about 9.5 trillion kilometers or 5.9 trillion miles. 

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Filed Under: Physics
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Bank Clerk , Bank PO

11 3314
Q:

IP address of a packet is normally analyzed by

A) Modem B) Router
C) Hub D) CPU
 
Answer & Explanation Answer: B) Router

Explanation:

The IP address of a packet is normally analyzed by Router.

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Filed Under: Networking
Exam Prep: Bank Exams
Job Role: Bank PO , Bank Clerk , Analyst , Database Administration , IT Trainer , Network Engineer

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