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labwork [276]
2 years ago
12

A chorus has 5 girls and 15 boys. If two are chosen at random to sing a duet, what is the probability that both will be boys?

Mathematics
2 answers:
Sonbull [250]2 years ago
8 0

Answer:

Step-by-step explanation:

If you ad them together you get 20 15/20 are boys 15 divided by 20 is .75

Galina-37 [17]2 years ago
8 0
.75 or 75%

If there’s 20 kids total in the class and 15 out of the 20 are boys then you would divide the 15 by 20 and get .75 if you were doing it for girls then you would divide 5 by 20 and you would get .25 or 25%
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The information from the first equation gives you the information needed for the second. To solve the first equation you must rearrange the equation to isolate X. In order to do that you can first move the 3 to the other side of the equation by subtracting it from both sides (5x + 3 - 3 = 4 - 3) and then simplify that to (5x = 4 - 3) and further to (5x = 1). Then to move the 5 you must divide both sides by 5 so you get (5x/5 = 1/5) which can be simplified to (x = 1/5)

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Hope this helps!
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Ivenika [448]

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