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victus00 [196]
4 years ago
15

Please show all the working out.

Mathematics
1 answer:
Elanso [62]4 years ago
4 0
11/26 chance that the student plays both instruments.

First, add the amount of students that just play flute or piano:

3 + 5 = 8

Then add 8 to the amount that does not play either instrument:

8 + 7 = 15

Then do:

26 - 15 = 11

Then place 11 over the amount of people:

11/26
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scoundrel [369]

Answer:

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Step-by-step explanation:

14 time 10 = 140 for flat surface

14 times 10 times 8 is 1120 for vollume

6 0
3 years ago
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In how many ways can a committee of 5 people be chosen from a total of 30 possible people?
Stolb23 [73]

Answer:  142506

Step-by-step explanation:

Given : The total number of choices for people in committee = 30

The number of people need to be chosen =5

Since , here order doesn't matter, so we use combination.

The combination of r things taking from n at a time is given by :-

C(n,r)=\dfrac{n!}{(n-r)!r!}

Now, the number of possible combinations of 5 people be chosen from a total of 30 possible people :-

C(30,5)=\dfrac{30!}{(30-5)!5!}\\\\=\dfrac{30\times29\times28\times27\times26}{120}\\\\=142506

Hence, the committee can be made in 142506 ways.

3 0
3 years ago
Please help me understand how to do this
erastova [34]

Answer:

-1

Step-by-step explanation:

First, find g(3), g(3) is 5.

Next, plug in 5 for g(3).

So we have f(5), f(5) is -1

6 0
2 years ago
The gray area is the sidewalk. The area of the sidewalk is ___________ square units.
alisha [4.7K]
The final answer will be 72 square units.

Hope this helps !

Photon
6 0
4 years ago
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The Eiffel Tower in Paris, France. Lizbeth is 5.5 feet tall. She looks up at an angle of elevation of 72° to see the top from 31
Galina-37 [17]

Answer:

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Step-by-step explanation:

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