Answer:
the answer is 31
Step-by-step explanation:
trust me bro
Twice a number can be written as 2n.
Four times the number can be written as 4n.
If the sum of 2n and 4n equals 54, then:
6n = 54
Divide both sides by 6 to solve for n:
n = 9
This is asking how many ways can we choose 13 songs from a set of 25.
The formula is:
n! / r! * (n -r)! =
25! / 13! * 12! which equals
25 *24 *23 *22 *21 *20 *19 *18 *17 *16 *15 *14 *13! divided by
13! * 12! which equals
25 *24 *23 *22 *21 *20 *19 *18 *17 *16 *15 *14 divided by
12* 11* 10* 9* 8* 7* 6* 5* 4* 3* 2*
which equals
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2,490,952,020,480,000
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</span>
divided by
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<span>
479,001,600
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</span>
</span>
and that equals
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5,200,300
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</span>
</span>
combinations
Here's a combination calculator to check your work:
http://www.1728.org/combinat.htm
Answer: 2000
Step-by-step explanation:
At a football game, 65% of people that will attend are supporting the home team, while 35% are supporting the visiting team. 1300 people that attended supported the home team.
To get the total number of people that attended the game, we have to find the number of away supporters as well.
Let the number of people that attended the game be y.
Therefore 65% of y = 1300
65/100 × y = 1300
0.65 × y = 1300
0.65y = 1300
Divide both side by 0.65
0.65y/0.65 = 1300/0.65
y = 2000
The total number of people attending the game is 2000.