PLEASE HELP!!!! A class of 40 students has 11 honor students and 10 athletes. Three of the honor students are also athletes. One student is chosen at random. Find the probability that this student is an athlete if it is known that the student is not an honor student. Round to the nearest thousandth. The answer is 0.241, but I need to know how to get this answer step by step.

Question

PLEASE HELP!!!!  A class of 40 students has 11 honor students and 10 athletes. Three of the honor students are also athletes. One student is chosen at random. Find the probability that this student is an athlete if it is known that the student is not an honor student. Round to the nearest thousandth.  The answer is 0.241, but I need to know how to get this answer step by step.

anonymous · Answer

Also this one:  
Participants in a study of a new medication received either medication A or a placebo. Make a tree diagram of the results of the study. Then find P(placebo and improvement).

Of all those who participated in the study, 80% received medication A.
Of those who received medication A, 76% reported an improvement.
Of those who received the placebo, 62% reported no improvement.

anonymous · Answer

@jim_thompson5910 
@whpalmer4 
@Luigi0210 
@Lena772 
@e. mccormick
@Ashleyisakitty 
@Zale101 
@iheartfood 
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anonymous · Answer

@Preetha 
@lowcard2 
@emma97

anonymous · Answer

@OrangeMaster 
@halorazer 
@random231

anonymous · Answer

I know how to get the answer but I'd just confuse you. .-.

anonymous · Answer

if you just wrote how you would do it step by step.  I think it would be fine.  @halorazer

anonymous · Answer

Any help would be great for me.  @halorazer

anonymous · Answer

Ugh. I'm too tired for this. .

lena772 · Answer

Please don't mass tag in future posts.