We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
+1
223
3
avatar

On a rainy day, every kid at Margo's school brings a raincoat, an umbrella, or both.  8% of the kids bring both. The total number of kids with umbrellas is twice the total number of kids with raincoats.

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

 Dec 11, 2018
edited by Guest  Dec 11, 2018
 #1
avatar+19811 
0

Deleted     

 Dec 11, 2018
edited by Guest  Dec 11, 2018
 #2
avatar+6045 
0

xxxxxxxxxxxxx

.
 Dec 11, 2018
edited by Rom  Dec 11, 2018
edited by Rom  Dec 12, 2018
 #3
avatar+104796 
+1

Imagine, for convenience sake, that there are 100 children at  the school

 

So  8 have both

 

We have this

 

Number Total =  Total Number Umbrellas +Total  Number Raincoats - Number Both

 

Let x be the number with raincoats.....so 2x = number with umbrellas

 

So we have

 

100  =   2x   + x     -   8     rearrange as

 

108  = 3x           divide both sides by 3

 

36 = x

 

And the number with umbrellas  = 2(36) = 72

 

But 8 of these have both....

 

So....the number with only umbrellas is   72 - 8  =  64  =   64/ 100  =  64%

 

Here's a Venn Diagram

 

cool cool cool

 Dec 12, 2018
edited by CPhill  Dec 12, 2018
edited by CPhill  Dec 12, 2018

20 Online Users

avatar
avatar
avatar