math  please help!!
posted by linda .
If rhys is late for his finite mathematics class, and the probability that he is on time is 3/4. however if he is on time, he is liable to be less concerned about punctuality for the next class and his probability being on time drops to 1/2. rhy is on time monday. find the probability that:
a) he is on time wednesday
b) he is late on thursday
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