paytonpaige22
26.10.2019 •
Mathematics
Aset of mugs costs $21.50. the sales-tax rate is 4.5 percent. what is the total amount you need to pay? you can use either method. $3.17 $22.47 $96.75
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Ответ:
Ответ:
(a) Shown below
(b) The expected time it takes for the bus to arrive is 7.5 minutes.
(c) The probability that the bus was missed if I arrived at the bus stop at 9:07 AM is 0.40.
Step-by-step explanation:
Let X = waiting time for the bus.
It is provided that the bus arrives at the bus stop uniformly between 9:05 AM and 9:10 AM.
The random variable X is uniformly distributed with parameters a = 5 and b = 10.
The probability density function of a Uniform distribution is:
(a)
The probability density function of the random variable X is:
The cumulative distribution function of the random variable X is:
(b)
The expected value of Uniform distribution is:
Compute the expected value of X as follows:
Thus, the expected time it takes for the bus to arrive is 7.5 minutes.
(c)
If I reach the bus stop at 9:07 AM and I have missed the bus, then this implies that the bus arrived between 9:05 AM and 9:07 AM.
Compute the probability that the bus arrived between 9:05 AM and 9:07 AM as follows:
Thus, the probability that the bus was missed if I arrived at the bus stop at 9:07 AM is 0.40.