Aptitude - Probability - Discussion
Discussion Forum : Probability - General Questions (Q.No. 3)
3.
In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?
Answer: Option
Explanation:
Total number of balls = (8 + 7 + 6) = 21.
| Let E | = event that the ball drawn is neither red nor green |
| = event that the ball drawn is blue. |
n(E) = 7.
| P(E) = |
n(E) | = | 7 | = | 1 | . |
| n(S) | 21 | 3 |
Discussion:
36 comments Page 3 of 4.
Vasu said:
1 decade ago
How the n(e) come as 7?
Sonu said:
1 decade ago
If at least one is blue means what is the answer?
Nandini said:
1 decade ago
How n(E) =7?
S.Sakthivel said:
1 decade ago
Because neither which is indicates that. So that the possibility for the red and green is not considered. Thus simultaneously the blue ball is taken under consideration.
Sravani said:
1 decade ago
n(E) =7 because there are 7 blue balls.
Aruna said:
1 decade ago
Neither red nor blue.
Then why we are take 7 blue balls only.
Can't understand.
Please clear my doubt.
Then why we are take 7 blue balls only.
Can't understand.
Please clear my doubt.
Sahi said:
1 decade ago
Hi aruna I think you didn't read the question properly it is clearly mentioned that neither red nor green, so the remaining are blue. Hence we hve to consider blue balls. Hope you got it :).
Monika said:
1 decade ago
HOW n(E)=7?
Sree said:
1 decade ago
There is a die with 10 faces. It is not known that fair or not. 2 captains want to toss die for batting selection. What is the possible solution among the following?
a) If no. is odd it is head, if no. is even it is tail
b) If no. is odd it is tail, if no. is even it is head
c) Toss a die until all the 10 digits appear on top face. And if first no. in the sequence is odd then consider it as tail. If it is even consider it as head.
what is the exact solution
a) If no. is odd it is head, if no. is even it is tail
b) If no. is odd it is tail, if no. is even it is head
c) Toss a die until all the 10 digits appear on top face. And if first no. in the sequence is odd then consider it as tail. If it is even consider it as head.
what is the exact solution
Hina said:
1 decade ago
What is the meaning that die is fair or not?
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