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# Help how to solve

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How do you solve this it's hard

When it rains, every student in Margo's school brings a raincoat, an umbrella, or both.  And 10% of the students bring both.  The total number of umbrellas brought is equal to twice the number of raincoats.

What percent of the students bring an umbrella only?  Explain your solution in complete sentences.

Apr 29, 2023

#1
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This should help: https://web2.0calc.com/questions/help-plz_66181

Apr 30, 2023
#2
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What percent of the students bring an umbrella only?

You can take CPhill's solutions to the bank.  That problem uses 8% instead of 10, but Chris shows you how to solve the problem.

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Apr 30, 2023
#3
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64%

Step-by-step exaplanation:

64% of the kids only bring an umbrella. Set up a system of equations: suppose x% of kids only bring raincoats, and y% only bring umbrellas. Since 8% of kids bring both, 1-8%=92% bring only one of the two, so x+y=92. Percent of kids who bring raincoats is x+8, and percent of kids bringing umbrellas is y+8. y+8=2(x+8). Solve the two equations, we get x=28, y=64. 64% kids only bring umbrellas.

May 1, 2023