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-BARSIC- [3]
3 years ago
13

There are 20 students in the high school glee club. They need to pick four students to serve as

Mathematics
2 answers:
gayaneshka [121]3 years ago
6 0

Answer:

4845 ways

Step-by-step explanation:

To solve this problem we use the formula of combinations

nCr=\frac{n!}{r!(n-r)!}

Where n is the total number of students that can be chosen and you choose r from them.

So

n = 20\\r = 4

Note that in this case the order in which the 4 students are chosen does not matter.

Then

20C4=\frac{20!}{4!(20-4)!}

20C4=\frac{20!}{4!*16!}=4845\ ways

devlian [24]3 years ago
4 0

Answer:

4845

Step-by-step explanation:

Total number of students : 20

Students to be picked : 4

Does order matter? : No

Use combination formula (see attached)

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<h3>\huge\sf\blue{Solution :-}</h3>

<u>Given,</u>

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<h3>=  > 21\pi =  \frac{1}{3} \times 36\pi \times h \\  =  > 21\pi = 12\pi \times h \\  =  >  \frac{21\pi}{12\pi}  = h \\  =  >  \frac{7}{4}  = h \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: =  > h \: = 1.75 \: cm</h3>

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Step-by-step explanation:

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The vertices of a parallelogram are shown below.
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(27,0) ⇒ 27 x 1/3 = 9 ; 0 x 1/3 = 0  ⇒ (9,0)
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