# Aptitude - Probability - Discussion

Discussion Forum : Probability - General Questions (Q.No. 15)

15.

A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?

Answer: Option

Explanation:

Let number of balls = (6 + 8) = 14.

Number of white balls = 8.

P (drawing a white ball) = | 8 | = | 4 | . |

14 | 7 |

Discussion:

29 comments Page 1 of 3.
Saurabh said:
1 decade ago

Suppose I have to find the probability of 3 bals that should be white. 'thn?

Alisha said:
1 decade ago

Then it will be 8C3/14C3.

Swathy said:
1 decade ago

What is meant by C3 here i did not get the point?

Hassan said:
1 decade ago

C3 means the possible combinations of 3 balls from a group of 8 or 14.

We can take 3 balls from this group in variety of manners and in such situations we use combinations and hence C3.

We can take 3 balls from this group in variety of manners and in such situations we use combinations and hence C3.

RamGom said:
1 decade ago

Ex:

We can get 1 ball means total 14 balls 1 combination that means 14C1 = 14.

If 2 ball means total 14 balls 2 combination that means 14C2 = 14x13/2x1 = 91.

And so on.

We can get 1 ball means total 14 balls 1 combination that means 14C1 = 14.

If 2 ball means total 14 balls 2 combination that means 14C2 = 14x13/2x1 = 91.

And so on.

PRISHILLA ANNA TOMY said:
10 years ago

If we get 1 balls that is the total of 14 balls and 1 combination that means 14c1 = 14.

Greeshma said:
9 years ago

Some more examples please.

Swati said:
9 years ago

Can anyone explain this question?

Karthick babu said:
8 years ago

Is it sufficient for engineering aptitude test?

Aastha said:
8 years ago

I didn't understand the question. Can someone explain?

Post your comments here:

Quick links

Quantitative Aptitude

Verbal (English)

Reasoning

Programming

Interview

Placement Papers