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jech3947
15.08.2019 •
Mathematics
During the year you must read 3 books for english class. you can choose from a list of 6 books. how many different sets of 3 books can you choose?
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Ответ:
120
Step-by-step explanation:
First book and Second Book and Third Book
6 choices x 5 remaining choices x 4 remaining choices = 120
If you want to use a formula:![\dfrac{6!}{(6-3)!}=\dfrac{6\times 5\times 4\times 3!}{3!}=6\times 5\times4=120](/tpl/images/0175/1223/b9e4f.png)
Ответ:
Step-by-step explanation:
The answer is 33, this is because 3.3 times 2 is 6.6. This is because he walks there and back. He does this 5 times because it's Monday to Friday. This means that we have to times 6.6 times 5.
The answer is 33.