Maryann is testing the effectiveness of a new acne medication. There are 100 people with acne in the study. Fifty-five patients received the acne medication, and 45 other patients did not receive treatment. Thirty of the patients who received the medication reported clearer skin at the end of the study. Twenty-two of the patients who did not receive medication reported clearer skin at the end of the study. What is the probability that a patient chosen at random from this study took the medication, given that they reported clearer skin?

Question

anonymous · Answer

55%?

anonymous · Answer

@jim_thompson5910

amistre64 · Answer

how many people reported clearer skin?

anonymous · Answer

30?

amistre64 · Answer

carefully read it again ... 30 is not the total number of people who reported clearer skin

anonymous · Answer

ok then idk:(

amistre64 · Answer

its stated plainly in your information ...

amistre64 · Answer

Thirty of the patients who received the medication reported clearer skin at the end of the study. 

Twenty-two of the patients who did not receive medication reported clearer skin

amistre64 · Answer

given that they reported clearer skin .. take everyone who reported clearer skin and put them in a room.

out of all of those people in the room, how many of them received medication?

jim_thompson5910 · Answer

Making a two way table may help

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