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Wittaler [7]
3 years ago
9

Paul has 9 soccer trophies, but only 6 will fit on his shelf. In how many different ways can he arrange 6 of the trophies on his

shelf?
Mathematics
1 answer:
lina2011 [118]3 years ago
3 0

Answer:

60,480

Step-by-step explanation:

To find the number of ways that Paul can arrange his trophies, we can use the permutation formula.

The permutation formula is:

_{n}P_{k}=\dfrac{n!}{(n-k)!}

n = 9

k = 6

Now let's put them into the formula.

_{9}P_{6}=\dfrac{9!}{(9-6)!}

_{9}P_{6}=\dfrac{9!}{3!}

_{9}P_{6}=\dfrac{9!}{3!}

_{9}P_{6}=60,480

There are 60,480 different ways that Paul can arrange his trophies on the shelf.

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<em></em>

Step-by-step explanation:

This given situation can be thought of as triangle \triangle PQR where PQ is the length of pole.

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\dfrac{PR}{sinQ}=\dfrac{PQ}{sinR}\\\Rightarrow sin Q =\dfrac{PR}{PQ}\times sinR\\\Rightarrow sin Q =\dfrac{51}{44}\times sin58^\circ\\\Rightarrow \angle Q =79.41^\circ

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\angle P +\angle Q +\angle R =180^\circ\\\Rightarrow \angle P +58^\circ+79.41^\circ=180^\circ\\\Rightarrow \angle P = 42.59^\circ

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\dfrac{QR}{sinP}=\dfrac{PQ}{sinR}\\\Rightarrow QR =\dfrac{sinP}{sinR}\times PQ\\\Rightarrow QR =\dfrac{sin42.59}{sin58}\times 44\\\Rightarrow QR = 35.11\ ft

So, the answer is <em>35.11 ft</em>.

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