The number of emergency cases in a health center is distributed Poisson with rate 3.5 per an hour, if you know that in a given hour three cases have occured, then the probability that exactly four cases will occur in this hour is:
a. |
0.588 |
d. |
0.653 |
b. |
0.278 |
e. |
0.352 |
c. |
0.407 |
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