using Venn diagram to find percentages drinking each beverag

[xjinaloveskangin]

Common sources of caffeine are coffee, tea, and cola drinks. Suppose that:

55% of adults drink coffee
25% of adults drink tea
45% of adults drink cola

and also that:

15% drink both coffee and tea
5% drink all three beverages
25% drink both coffee and cola
5% drink only tea

Draw a venn diagram marked with this information. Use it along with the addition rules to answer:

a) what percent of adults drink only cola?
b) what percent drink none of these beverages?

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I'm really really confused on how to figure out each of the places in the venn diagram ...

i know one of the addition rules for unions of two events is:
P(A or B)=P(A) + P(B) - P(A and B).

but i have no idea how to use it ... and where to start in the percentages, to find out others, cuz there is so much information O___O Please help asap! Thank you!

 

[pka]

Re: I really really need help !! please? thank you

15% drink both coffee and tea
5% drink all three beverages
25% drink both coffee and tea
5% drink only tea

You must correct what you posted.
Look at the red, it cannot be both.

 

[xjinaloveskangin]

Okay ... I fixed the mistake...



Please help. Thank you!!!!

 

[galactus]

You just have to study what;s given and put it together.

I hope I didn't mislabel anything.