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LekaFEV [45]
3 years ago
7

A school librarian is purchasing books for the next school year. She surveyed 25 students and 6 said that they prefer science fi

ction books. If there are 125 total students, how many science fiction books should be purchased.
Mathematics
1 answer:
Svetlanka [38]3 years ago
5 0

Answer:

30 science fiction books

Step-by-step explanation:

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Jessica wrote down a fraction on a piece of paper. If you take her fraction and multiply it by four you get sex. can you guess w
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1 1/2

6÷4 = 1 1/2

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3 years ago
A student draws several cards from a deck of 10 unique cards.
egoroff_w [7]

Answer:

There are 210 different ways that 4 cards can be drawn.

There are 252 different ways that 5 cards can be drawn.

There are 120 different ways that 7 cards can be drawn.

Step-by-step explanation:

Use the combination formula

10C4 =210

10C5 = 252

10C7 = 120

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A

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4 0
3 years ago
A restaurant has 5 pizza toppings to choose from. How many different 2-topping pizzas are possible?
horsena [70]
10


Because if you do 5•2 you get 10

More in depth explanation:

Though there are 25 possible configurations the question asks for two different toppings together. It also asks for unique combinations. So AB and BA are the same combination in this context. The only unique possibilities are

AB
AC
AD
AE
BC
BD
BE
CD
CE
DE

It is easy to simplify this into 5•2 for this situation. And if the question asked for three toppings you would do 5•3.

However if the question asked for the configurations for two toppings then you would do 5•5 and if it asked for the configurations of 3 toppings you would do 5•5•5
5 0
3 years ago
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