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?
3
4
4
7
1
8
3
7
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.

RamGom said:   10 years 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.

PRISHILLA ANNA TOMY said:   9 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:   8 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?


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