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mathmath333
 one year ago
There are 7 different books in a library.
A girl can borrow book B if only book A is borrowed.
In how many ways can she borrow 3 books ?
mathmath333
 one year ago
There are 7 different books in a library. A girl can borrow book B if only book A is borrowed. In how many ways can she borrow 3 books ?

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mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0\(\large \color{black}{\begin{align} & \normalsize \text{There are 7 different books in a library. }\hspace{.33em}\\~\\ & \normalsize \text{A girl can borrow book B if only book A is borrowed.} \hspace{.33em}\\~\\ & \normalsize \text{In how many ways can she borrow 3 books ?} \hspace{.33em}\\~\\ & a.)\ 15 \hspace{.33em}\\~\\ & b.)\ 20 \hspace{.33em}\\~\\ & c.)\ 25 \hspace{.33em}\\~\\ & d.)\ 30 \hspace{.33em}\\~\\ \end{align}}\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is there any specific arrange for A and B ?

mathmate
 one year ago
Best ResponseYou've already chosen the best response.1``` A girl can borrow book B if only book A is borrowed ``` Must book A be borrowed by the girl or by someone else?

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0book B can be borrowed only if book A is borrowed

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0yes 25 is answer given , how u got it

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1I am confused by the question. But phi is not :)

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0"A girl can borrow book B if only book A is borrowed" i think "Must book A be borrowed by the girl "

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0lol m also confused by thhe question

mathmate
 one year ago
Best ResponseYou've already chosen the best response.1"A girl can borrow book B if only she also borrows book A" is the intended wording if 25 is the final answer.

phi
 one year ago
Best ResponseYou've already chosen the best response.3First, order does not matter. I broke the problem into two parts. say one of the 3 books we choose is A. then we have a choice of 6C2 for the other two. that is 15 combinations say we did not choose A. then that means we can not choose B either. that leaves 5 books from which to choose 3 5C3= 10 more combinations 15+10= 25

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0"A girl can borrow book B if only she also borrows book A" is the intended wording if 25 is the final answer. yea i think so ,
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