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Mice21 [21]
2 years ago
15

There are 21 mathematic majors and 129 computer science majors at a college. A) How many ways are there to pick 4 representative

s, so that 2 is/are mathematics majors and the other 2 is/are computer science majors
Mathematics
1 answer:
kirza4 [7]2 years ago
7 0

Answer: 1,733,760

Step-by-step explanation:

The number of combinations of selecting m things from n things is given by :-

^nC_m=\dfrac{n!}{m!(n-m)!}

Given : There are 21 mathematics majors and 129 computer science majors at a college.

Then, the number of ways to pick 4 representatives, so that 2 are mathematics majors and the other 2 are computer science majors :-

^{21}C_2\times^{129}C_2\\\\=\dfrac{21!}{2!(21-2)!}\times\dfrac{129!}{2!(129-2)!}\\\\=\dfrac{21\times20\times19!}{2\times19!}\times\dfrac{129\times128\times127!}{2\times127!}\\\\=210\times8256= 1733760

Hence, the number of ways to pick 4 representatives, so that 2 are mathematics majors and the other 2 are computer science majors =1,733,760

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Answer:

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Step-by-step explanation:

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2 years ago
Given a mean of 52.3 and a standard deviation of 1.8, what is the z-score of the value 51.8 rounded to the nearest tenth?
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Substituting the known values,
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3 years ago
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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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2 years ago
How can I solve these problems
KATRIN_1 [288]

Answer:


Step-by-step explanation:

Easy the three angles of a triangle equal 180 degrees

so 60+75 = 135 --> 180-135=

1) 145

2) 35

3)  no since the tops a 100 and its a Isosceles triangle two corners left it be 40 for each corner

4) 34 for both x's cause 34+34+112. = 180

5) 180- 120= 60- 10 = 50/4 is (12.5)= x

6) x = 15 cause it be 120- 60 to get 60

4 0
2 years ago
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