Question 1192381: A die is tossed 120 times. What is the probability that at least (5) dots on the top face occurs between 25 and 40 times inclusive?
Answer by ikleyn(52824)   (Show Source):
You can put this solution on YOUR website! .
A die is tossed 120 times. What is the probability that at least (5) dots on the top face
occurs between 25 and 40 times inclusive?
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The problem is posed incorrectly.
First, the info about 120 tosses is unrelated and irrelevant.
Our attention should be focused on 16 tosses from 25 to 40 inclusive, only.
Second, the problem asks about the probability to get at least 5 dots om the top face,
but does not specify, how many times this event is expected to happen:
- once ? - two times ? - 9 times ? - at leat once ?
The problem's composer deserves a ticket for his (or her) work.
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