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Byju's Answer
Standard XII
Mathematics
Combination with Restrictions
How many diff...
Question
How many different selections of 4 books can be made from 10 different books, if there is no restriction?
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Solution
Since, it's a point of selection so the required selection combination is:
Number of ways of selecting 4 books out of
10
=
10
C
4
=
10
!
4
!
×
6
!
=
210
.
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