Permutation and CombinationHard
Question
The number of ways selecting 8 books from a library which has 10 books each of Mathematics, Physics, Chemistry and English, if books of the same subject are alike, is:
Options
A.13C4
B.13C3
C.11C4
D.11C3
Solution
Using multinomial theorem
total number of required selection is
8+3C8 = 11C8 = 11C3
total number of required selection is
8+3C8 = 11C8 = 11C3
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