JEE Exam  >  JEE Questions  >  There are two balls in an urn whose colours a... Start Learning for Free
There are two balls in an urn whose colours are not known (each ball can be either white or black).
A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white is
  • a)
    1/4
  • b)
    1/3
  • c)
    2/3
  • d)
    1/6
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
There are two balls in an urn whose colours are not known (each ball c...
Free Test
Community Answer
There are two balls in an urn whose colours are not known (each ball c...
Given Information:
- There are two balls in an urn.
- The colors of the balls are not known.
- A white ball is put into the urn.
- A ball is drawn from the urn.

To find:
The probability that the ball drawn from the urn is white.

Solution:
Let's analyze the problem step by step.

Possible Combinations:
Since there are two balls in the urn, the possible combinations of colors are:
1. White, White
2. White, Black
3. Black, White
4. Black, Black

Given Information:
We are given that a white ball is put into the urn. This means that one of the possible combinations is eliminated, and we are left with the following combinations:
1. White, White
2. White, Black

Possible Outcomes:
We need to determine the probability of drawing a white ball from the urn. Since one ball is already known to be white, the possible outcomes are:
1. White (from the combination White, White)
2. White (from the combination White, Black)

Probability Calculation:
The probability of drawing a white ball can be calculated by dividing the number of favorable outcomes (white balls) by the total number of possible outcomes (balls in the urn).

Number of Favorable Outcomes:
From the possible outcomes, we can see that there are 2 favorable outcomes (white balls).

Total Number of Possible Outcomes:
From the given information, we know that there are 2 balls in the urn.

Probability:
The probability of drawing a white ball can be calculated as:
Probability = Number of Favorable Outcomes / Total Number of Possible Outcomes

Substituting the values, we get:
Probability = 2 / 2 = 1

Therefore, the probability that the ball drawn from the urn is white is 1 or 100%.

Answer:
The correct answer is option 'C' - 2/3.
Explore Courses for JEE exam
There are two balls in an urn whose colours are not known (each ball can be either white or black).A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white isa)1/4b)1/3c)2/3d)1/6Correct answer is option 'C'. Can you explain this answer?
Question Description
There are two balls in an urn whose colours are not known (each ball can be either white or black).A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white isa)1/4b)1/3c)2/3d)1/6Correct answer is option 'C'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about There are two balls in an urn whose colours are not known (each ball can be either white or black).A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white isa)1/4b)1/3c)2/3d)1/6Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for There are two balls in an urn whose colours are not known (each ball can be either white or black).A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white isa)1/4b)1/3c)2/3d)1/6Correct answer is option 'C'. Can you explain this answer?.
Solutions for There are two balls in an urn whose colours are not known (each ball can be either white or black).A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white isa)1/4b)1/3c)2/3d)1/6Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE. Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free.
Here you can find the meaning of There are two balls in an urn whose colours are not known (each ball can be either white or black).A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white isa)1/4b)1/3c)2/3d)1/6Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of There are two balls in an urn whose colours are not known (each ball can be either white or black).A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white isa)1/4b)1/3c)2/3d)1/6Correct answer is option 'C'. Can you explain this answer?, a detailed solution for There are two balls in an urn whose colours are not known (each ball can be either white or black).A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white isa)1/4b)1/3c)2/3d)1/6Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of There are two balls in an urn whose colours are not known (each ball can be either white or black).A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white isa)1/4b)1/3c)2/3d)1/6Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice There are two balls in an urn whose colours are not known (each ball can be either white or black).A white ball is put into the urn. A ball is drawn from the urn. The probability that it is white isa)1/4b)1/3c)2/3d)1/6Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice JEE tests.
Explore Courses for JEE exam

Top Courses for JEE

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev