In a certain college, 25% of the students failed mathematics, 15% of the students failed chemistry and 10% of the students faile
d both mathematics and chemistry. a student is selected at random. if he failed chemistry what is the probability that he failed mathematics?
1 answer:
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Answer:
D. 81
Step-by-step explanation:
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Here is my answer:
Number of days: 30
Mean of the data set = (68 + 70*2 +74*2 +76*4 +78 +80*5 + 82*3 +84*5 + 88 +88*3 + 92*3) /30 = 81
