Problem 10.14

Suppose that 25% of all calculus students get an A; and that students who

had an A in calculus

who had a lower grade in calculus. If a student who received an A in Math

408 is chosen at random, what is the probability that he/she also received

an A in calculus?

(Assume all students in Math 408 have taken calculus.)

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The part I do NOT get is the bolded part above. Could someone help me interpret how students who had an A in calculus are 50% MORE LIKELY to get an A in Math 408 as those who had a lower grade in calculus?

This is the only part that's bugging me. Otherwise, once I understand this part, the rest of the problem should be ok.

Thanks!

Suppose that 25% of all calculus students get an A; and that students who

had an A in calculus

**are 50% more likely**to get an A in Math 408 as thosewho had a lower grade in calculus. If a student who received an A in Math

408 is chosen at random, what is the probability that he/she also received

an A in calculus?

(Assume all students in Math 408 have taken calculus.)

--------------------------------------------------------------------------

The part I do NOT get is the bolded part above. Could someone help me interpret how students who had an A in calculus are 50% MORE LIKELY to get an A in Math 408 as those who had a lower grade in calculus?

This is the only part that's bugging me. Otherwise, once I understand this part, the rest of the problem should be ok.

Thanks!

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