A concert has tickets for sale. student tickets cost $3.50 and adult tickets cost $5.50. If 30 tickets were sold for a total of
$145, how many of each type was sold?
(help me with number 4 too maybe?)
(help me with number 4 too maybe?)
1 answer:
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Answer:
And we can find this probability with the normal standard distirbution or excel and we got:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the lenghts of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability with the normal standard distirbution or excel and we got:
Answer:
Area of the flying saucer =
Step-by-step explanation:
The Flying saucer is in the shape of a circle.
Area of the circular flying saucer=
:
Area=
Area of the flying saucer
So, the area of the flying saucer is