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AP EAMCET Engineering 22 Sep 2020 Shift 1 Paper
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© examsnet.com
Question : 6
Total: 160
Given that a throw of three unbiased dice shows different faces, what is the probability that their total is eight ?
1
10
23
256
13
36
17
20
Validate
Solution:
Number of ways to get different faces on the a throw of three unbiased dice are
6
C
3
=
6
×
5
×
4
3
×
2
=
20
and the number of ways to
get their total is eight
(
1
,
2
,
5
)
,
(
1
,
3
,
4
)
only. So, the required probability
=
2
20
=
1
10
© examsnet.com
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