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UPSC NDA Math Model Paper 6
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© examsnet.com
Question : 15
Total: 120
Three houses are available in a locality. Three persons apply for the houses. Each applies for one house without consulting others. The probability that all the three apply for the same house is
8 / 9
7 / 9
2 / 9
1 / 9
Validate
Solution:
number of house
(
m
)
=
3
number of people applying for house
(
n
)
=
3
total number of way three people can apply for house
=
3
3
=
27
Number of way in which all people apply for same house
=
3
P
(
all three applying for same house )
=
3
27
=
1
9
© examsnet.com
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