a 10-key keypad with letters A, B, C, D, E, F, G, H, I, and J that can be used to open the garage if the correct ten
.Outside a home, there is
a 10-key keypad with letters A, B, C, D, E, F, G, H, I, and J that can be used to open the garage if the correct ten
ten-letter code is entered. Each key may be used only once. How many codes are possible?
The number of possible codes is____
2.The table below shows the number of male and female students enrolled in nursing at a particular university for a recent semester.
(a) Find the probability that a randomly selected student is male, given that the student is a nursing major.
(b) Find the probability that a randomly selected student is a nursing major, given that the student is male.
Nursing Majors
Non-nursing majors
Total
Males
91
91
1148
1148
1239
1239
Females
716
716
1662
1662
2378
2378
Total
807
807
2810
2810
3617
3617
(a) Find the probability that a randomly selected student is male, given that the student is a nursing major.
The probability is ____.
(Round to three decimal places as needed.)
(b) Find the probability that a randomly selected student is a nursing major, given that the student is male.
The probability is
nothing
.
(Round to three decimal places as needed.)
3.Students in a class take a quiz with eight questions. The number x of questions answered correctly can be approximated by the following probability distribution. Complete parts (a) through (e).
x
0
1
2
3
4
5
6
7
8
P(x)
0.02
0.02
0.01
0.01
0.06
0.06
0.06
0.06
0.09
0.09
0.25
0.25
0.28
0.28
0.16
0.16
0.07
0.07
(a) Use the probability distribution to find the mean of the probability distribution.
mu
μequals
=
nothing
(Round to the nearest tenth as needed.)
(b) Use the probability distribution to find the variance of the probability distribution.
sigma squared
σ2equals
=
(Round to the nearest tenth as needed.)
(c) Use the probability distribution to find the standard deviation of the probability distribution.____
(Round to the nearest tenth as needed.)
(d) Use the probability distribution to find the expected value of the probability distribution. ____
(Round to the nearest tenth as needed.)
(e) Interpret the results.
A.The expected number of questions answered correctly is 5.3 with a standard deviation of 0.02 questions.
B.The expected number of questions answered correctly is 3 with a standard deviation of 1.7 questions.
C.The expected number of questions answered correctly is 5.3 with a standard deviation of 1.7 questions.
D.The expected number of questions answered correctly is 1.7 with a standard deviation of 5.3
Step-by-step
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"
