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2 years ago

4

Mathematics

1 answer:

vodka [1.7K]2 years ago

5 0

Answer:

N=2 hours

Step-by-step explanation:

She spent a total of 10 dollars.

Ice skate rental costs 4$

The fee per hour for skating is 3$ per hour

So minus 10$ by 4$, which is 6$

So now here at six and each fee per hour cost 3$, so therefore she skated for N= 2 hours.

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<h3>What is the combination formula?</h3>

Each of the different groups or selections can be formed by taking some or all of a number of objects, irrespective of their arrangments is called a combination.

$^mC_k = \dfrac{m!}{k! \times (m-k)!}$

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Since they are independent of each other, the total number of combinations will be;

$^mC_k = \dfrac{8!}{3! \times (5)!} \times \dfrac{6!}{4! \times (2)!} \times \dfrac{8!}{3! \times (5)!} \\\\^mC_k =47,040$

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