A pet store sells puppies and kittens in the ratio 5 : 4 . If their sales of puppies and kittens combined came to 27, how many p
2 answers:
Answer:
15 puppies
Step-by-step explanation:
A pet store sells puppies and kittens in the ratio 5 : 4
As per the ratio, total puppies and kittens is 5+4= 9
If their sales of puppies and kittens combined came to 27
The ratio of puppies to the total is 5:9
LEt x be the puppies sold
RAtio of puppies sold to the total is x: 27
Now make a proportion using the ratio and solve for x
cross multiply it
Divide both sides by 9
x=15
S, 15 puppies
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Answer:
a) 9.93% probability that exactly ten requests are received during a particular 2-hour period
b) 13.53% probability that they do not miss any calls for assistance
c) 2
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.
Poisson process with rate θ = 4 per hour.
This means that , in which n is the number of hours.
a. Compute the probability that exactly ten requests are received during a particular 2-hour period.
n = 2, so
This is P(X = 10). So
9.93% probability that exactly ten requests are received during a particular 2-hour period
b. If the operators of the towing service take a 30-min break for lunch, what is the probability that they do not miss any calls for assistance?
n = 0.5, so
This is P(X = 0). So
13.53% probability that they do not miss any calls for assistance
c. How many calls would you expect during their break?
n = 0.5, so