Aptitude - Probability - Discussion
Discussion Forum : Probability - General Questions (Q.No. 4)
4.
What is the probability of getting a sum 9 from two throws of a dice?
Answer: Option
Explanation:
In two throws of a dice, n(S) = (6 x 6) = 36.
Let E = event of getting a sum ={(3, 6), (4, 5), (5, 4), (6, 3)}.
 P(E) = |
n(E) | = | 4 | = | 1 | . |
| n(S) | 36 | 9 |
Discussion:
52 comments Page 3 of 6.
Shankar said:
9 years ago
Thanks for your solution @Sreejith.
Harini said:
9 years ago
How could n (S) be 36?
Yallaling Dashavant said:
9 years ago
Sum 9 means (1,8)(2,7)(3,6)(4,5)(5,4)(6 3)(7,2).
Means 8/36 = 2/9.
Means 8/36 = 2/9.
Sarita said:
9 years ago
How can it be 6x6?
Two throws of a dice mean 6+6. Your answer can only be till 12, not 36.
Two throws of a dice mean 6+6. Your answer can only be till 12, not 36.
Neetu Sanghvi said:
9 years ago
I agree @Sree Tulasi.
Prince said:
8 years ago
Why we take these cases only?
(3+6) = 9.
(4+5) = 9.
(5+4) = 9.
(6+3) = 9.
(3+6) = 9.
(4+5) = 9.
(5+4) = 9.
(6+3) = 9.
NAROTTAM said:
1 decade ago
Is there any short method to choose number of event ?
Rama said:
1 decade ago
How to select n(e) = 4.
VIAN said:
1 decade ago
@rama.
That is because the event of finding the sum 9 is 4.
That is because the event of finding the sum 9 is 4.
AZAM said:
1 decade ago
In two throws of a dice, n(S) = (6 x 6) = 36.
HOW IT DO
PLEASE EXPLAIN
HOW IT DO
PLEASE EXPLAIN
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