Aptitude - Probability - Discussion
Discussion Forum : Probability - General Questions (Q.No. 8)
8.
In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?
Answer: Option
Explanation:
| P (getting a prize) = | 10 | = | 10 | = | 2 | . |
| (10 + 25) | 35 | 7 |
Discussion:
25 comments Page 3 of 3.
Nikhil said:
6 years ago
What is the meaning of blank in this question? Please tell about it.
(5)
Sahil said:
4 years ago
See my problem is that why we have added prizes and blanks?
Why we are selecting from 35 samples instead of 25 samples?
My answer is 10/25. Correct me If I am wrong.
Why we are selecting from 35 samples instead of 25 samples?
My answer is 10/25. Correct me If I am wrong.
(9)
Purva said:
3 years ago
Using the complement rule:
P(prize) = 1 - P(blanks).
P(prize) = 1 -25/35 = 2/7.
P(prize) = 1 - P(blanks).
P(prize) = 1 -25/35 = 2/7.
(5)
Abiti said:
3 months ago
Thank you everyone for explaining the answer.
(2)
Mohith Valmiki said:
1 month ago
25+ 10 = 35,
10C1/35C1 = 2/7.
10C1/35C1 = 2/7.
(1)
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