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OpenStudy (anonymous):
You throw a coin 5 times. What is the probability that the coin will land heads exactly 3 times? What is the probability that the coin willl land heads the first and last time?
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OpenStudy (amistre64):
since the probability of a fair coin is 1/2 for either side: this simplifies to the number of times you can get 3 out of 5, time (1/2)^5
OpenStudy (amistre64):
since there is only 1 way to get the second option: its just 1 out of all the difference events
OpenStudy (amistre64):
which i want to say simplifies to (1/2)^5
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