A store pays $245 for radio. The store marks the radio up 65%. What is the selling price for the radio? Explain answer and earn
2 answers:
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There is a theorem that we can use to find the expected value of a random variable that is a sum of other random variables as follows.
If
, then 
.
In this case, let X = the number of accidents that will happen on any of those highways today,
are the numbers of accidents on each highway, respectively.
Then
.
Since are Poisson variates, their expected values are the parameters given, .3, .5 and .7.
So
Thus,
The answer is 1.5.
If
In this case, let X = the number of accidents that will happen on any of those highways today,
Then
Since
So
Thus,
The answer is 1.5.