A college Calculus 1 course with 15 (20) who have (had) some(none) calculus in high school & probability of 3/10 (1/10) of making an "A" in Calculus 1. Some student earns "A", what is the probability of said student had some calculus in high school?
probability word problems
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probability
1 Answers
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What information do we have?
P(Had Calc) = 15/35 P(Gets A | Had Calc) = 3/10 P(Gets A | Not Had Calc) = 1/10
So we can use P(A|B) = P(B|A)*P(A)/P(B)
like so:
P(Had Calc | Gets A) = P(Gets A | Had Calc) * P(Had Calc) / P(Gets A)
We still need P(Gets A)
, but I'm sure you can figure that out.
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0Do you mind walking me thru this problem to make sure I got the correct answer? – 2012-09-29