1 in/2.54 cm = 90 in/? cm
1 answer:
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Answer:
0.8753
Step-by-step explanation:
Calculate the probability that your job will be ready before 10.01 am
Here, the parameter of an Exponential is E(X)=12
Now, to calculate the third job probability, it follows Poisson Distribution with parameter 1/λ
Therefore, E(Y) =1/12
Here, The third job will be ready for 10:01 AM, then E(Y)=61/12
Therefore, the required probability is
=1- POISSON(3,5,true)
=1-0.1246
=0.8753
We know that 15 elves represent the 20% of the total.
Since 20% is one-fifth, the total number of elves is
Alternatively, solve the proportion
which yields