7
10
of your friends prefer to take a math test on Friday.
7
20
prefer Friday and Wednesday. What fraction of those who prefer Friday also prefer Wednesday?
answer is 1/2
p(wednesday|friday)=p(Fridayand Wednesday)/p(Friday)
7/20/7/10=1/2
so i am in 11th grade and i am doing geometry and i need help with this question
7/10 + 7/20 = 21/20
So, 1/20 prefer both.
But how can someone prefer two days?
7
10
of your friends prefer to take a math test on Friday.
7
20
prefer Friday and Wednesday. What fraction of those who prefer Friday also prefer Wednesday?
To find the fraction of those who prefer Friday and also prefer Wednesday, we need to determine the number of friends who prefer both Friday and Wednesday and divide it by the total number of friends who prefer Friday.
Let's break down the given information:
- 7 of your friends prefer to take a math test on Friday.
- 20 of your friends prefer both Friday and Wednesday.
To find the fraction, we'll use the formula:
Fraction = Number of friends who prefer both Friday and Wednesday / Number of friends who prefer Friday
So, in this case, the fraction will be:
Fraction = 20 / 7
To simplify the fraction, we can't reduce it any further because 20 and 7 do not share any common factors. Therefore, the fraction is 20/7.
Hence, the fraction of those who prefer Friday and also prefer Wednesday is 20/7.