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Mathematics 17 Online
OpenStudy (daniellelovee):

@jim_thompson5910 how would it be with this type of diagram?

OpenStudy (daniellelovee):

OpenStudy (daniellelovee):

P(the school has red as an official color given they have blue as an official color) = P(the school has blue as an official color given they have red as an official color) =

OpenStudy (daniellelovee):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

let's focus on `P(the school has red as an official color given they have blue as an official color) `

jimthompson5910 (jim_thompson5910):

the key phrase is ` given they have blue as an official color` so focus on just the blue circle only. What numbers are in this circle?

OpenStudy (daniellelovee):

10 4 2 8

jimthompson5910 (jim_thompson5910):

so in total, there are 10+4+2+8 = 24 schools in the blue circle

jimthompson5910 (jim_thompson5910):

how many have both red and blue?

OpenStudy (daniellelovee):

4 and 2?

jimthompson5910 (jim_thompson5910):

yes so 6

jimthompson5910 (jim_thompson5910):

P(the school has red as an official color given they have blue as an official color) would be equal to (# of red and blue)/(# of blue total) = 6/24 = 1/4

OpenStudy (daniellelovee):

alright im going to try and do the second one can you check if its right?

jimthompson5910 (jim_thompson5910):

sure

OpenStudy (daniellelovee):

6/28?

jimthompson5910 (jim_thompson5910):

be sure to reduce as much as possible

OpenStudy (daniellelovee):

3/14?

jimthompson5910 (jim_thompson5910):

correct

OpenStudy (daniellelovee):

ok thank you :)

jimthompson5910 (jim_thompson5910):

no problem

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