PLEASE HELP! I will give a medal :)
In a city school, 70% of students have math class, 65% have science class, and 45% have math and science class this semester. What is the probability (rounded to the nearest whole percent) that a randomly selected student will have science class this semester, given that the student is in math class?
93%
20%
69%
64%
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OpenStudy (anonymous):
Do you know how to start it off?
OpenStudy (anonymous):
I know how to solve it, but I am just not sure how to set the equation up
OpenStudy (anonymous):
@lovingod786
OpenStudy (anonymous):
Ok can you just walk me thru or show what you do to solve it?
OpenStudy (anonymous):
Wait, are you trying to help me? Or are you the one needing the help?
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OpenStudy (anonymous):
I need help
OpenStudy (anonymous):
I asked the question. I am the one that needs help. Sorry
OpenStudy (anonymous):
let me read the qeustion ill help
OpenStudy (anonymous):
Ok thank you! @dabest21
OpenStudy (anonymous):
no problem
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OpenStudy (anonymous):
Oh wait I'm sorry haha...I thought this was my problem
OpenStudy (anonymous):
But yeah show me what you did to solve it?
OpenStudy (anonymous):
first make a chart |dw:1453129035016:dw| i dropped the percentage signs to make it easier to understand the 180 is the total 180=100%
OpenStudy (anonymous):
do u see how i made this @Snufflebug02
OpenStudy (anonymous):
Okay yes I understand
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OpenStudy (anonymous):
so we r looking for a person who will have science and math what number percent is that
OpenStudy (anonymous):
45
OpenStudy (anonymous):
and the total is 180 so 45/180=?
OpenStudy (anonymous):
0.25
OpenStudy (anonymous):
wit a secd real quick
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OpenStudy (anonymous):
i started wrong
OpenStudy (anonymous):
Okay
OpenStudy (anonymous):
r u sure thats the right question
OpenStudy (anonymous):
What do you mean?
OpenStudy (anonymous):
it would make more sense if the 65 was 55
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OpenStudy (anonymous):
It's right. If you are not able to solve it, it's ok.
OpenStudy (anonymous):
ill figure it out
OpenStudy (anonymous):
Okay
OpenStudy (anonymous):
ok so 7/10*6.5/10=?
OpenStudy (anonymous):
0.455
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OpenStudy (anonymous):
good
so that s about .45
OpenStudy (anonymous):
@DaBest21 When you are done here can you help me with my problem?? I already tagged u
OpenStudy (anonymous):
ok i think ive got it
OpenStudy (anonymous):
That's not a choice
OpenStudy (anonymous):
a=70 b=65 and c=45
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OpenStudy (anonymous):
do (b/a)
OpenStudy (anonymous):
do (.65/.7)
OpenStudy (anonymous):
r uthere @Snufflebug02
OpenStudy (anonymous):
message me when ur back
OpenStudy (anonymous):
I got 0.92
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OpenStudy (anonymous):
actually .928 which rounds to .93 or 93%
OpenStudy (anonymous):
Ok thanks!
OpenStudy (anonymous):
If you need anymore help message me. Plus, don't forget to medal and fan.