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Damm [24]
4 years ago
7

the bookstore has 6 shelves of books about animals. there are 30 books on each shelf. how many books about animals does the book

store have
Mathematics
1 answer:
Vikentia [17]4 years ago
6 0
It should be 5 on each shelf.
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Step-by-step explanation:

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What is the probability of randomly guessing at least 8 out of 10 questions correct on a true-or-false quiz?
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P( at least 8 correct ) = 
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<span>Note: Let C denote correct and I denote incorrect. Suppose that guessing results in 8 correct and 2 incorrect answers. One possible outcome is CCCCCCCCII, for example. We can think of the number of ways of getting exactly 8 correct to be the same as the number of ways of selecting 8 spots for the correct answers times the number of ways of selecting two spots for the remaining two answers. There are (10 C 8) ways to select the positions for the correct answers and precisely one way to select the remaining two positions for the incorrect answers. Therefore, there are there are 10 C 8 = 45 ways to get 8 correct. Similarly, there are 10 C 9 = 10 ways to get 9 correct, and 10 C 10 = 1 way to get all 10 correct.</span>
3 0
3 years ago
A wire 27 cm long is cut into two pieces. The longer piece is 3 cm longer than the shorter piece
joja [24]

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Step-by-step explanation:

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Now we know that the total length of the wire is 27cm so

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2x = 24

x = 12 cm

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Step-by-step explanation:

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