A boy has 3 library tickets and 8 books of his interest in the library – InterviewSolution

InterviewSolution

1.	A boy has 3 library tickets and 8 books of his interest in the library.Of these 8, he does not want to borrow Chemistry part II, unless ChemistryPart I is also borrowed. In how many ways can be choose thethree books to be borrowed?
Answer» 1) When chemistry part I is borrowed`=.^7C_2` 2) When chemistry part I is not borrowed`=.^6C_3` Total number of ways`=.^7C_2+.^6C_3` `=(763)/2+(654)/6` `=21+20=41`.

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