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NDA Math Probability
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© examsnet.com
Question : 20
Total: 100
A box has ten chits numbered 0, 1, 2, 3, …., 9. First, one chit is drawn at random and kept aside.From the remaining, a second chit is drawn at random. What is the probability that the second chit drawn is “9”?
[NDA I 2018]
1
10
1
9
1
90
None of the above
Validate
Solution:
n
(
E
)
=
1
,
n
(
S
)
=
10
×
9
=
90
P
(
E
)
=
1
90
© examsnet.com
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