Answer:
3500 students actually enroll
Step-by-step explanation:
20000*0.7*.25=3500
Answer:
0.0498 = 4.98%
Step-by-step explanation:
In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

In which
x is the number of sucesses
e = 2.71828 is the Euler number
is the mean in the given time interval.
Inquiries arrive at a record message device according to a Poisson process of rate 15 inquiries per minute.
Each minute has 60 seconds.
So a rate of 1 inquire each 4 seconds.
The probability that it takes more than 12 seconds for the first inquiry to arrive is approximately
Mean of 1 inquire each 4 seconds, so for 12 seconds 
This probability is P(X = 0).


The answer to your question is 25 i think
So 22 is 44% of something
22=44% of x
'of' means multiply
22=44% times x
percent means parts out of 100
44%=44/100
22=44/100 times x
22=44x/100
multiply boht sides by 100
2200=44x
divide both sides by 44
50=x
the number is 50