SOLUTION: if the probability of getting a lift to work on any morning is 0.6 .X is the number of days in a working week of 5 days
(a) what is the probability distribution of X? (pleas
Algebra.Com
Question 959161: if the probability of getting a lift to work on any morning is 0.6 .X is the number of days in a working week of 5 days
(a) what is the probability distribution of X? (please justify)
(b) what is the probability that in a working week will get a lift only twice?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
if the probability of getting a lift to work on any morning is 0.6 .X is the number of days in a working week of 5 days
(a) what is the probability distribution of X? (please justify)
mean = np = 5*0.6 = 3
std = sqrt(npq) = sqrt(3*0.4) = sqrt(1.2)
----------------------------------
(b) what is the probability that in a working week will get a lift only twice?
P(x = 2) = 5C2*0.6^2*0.4^3 = binompdf(5,0.6,2) = 0.2304
------------
Cheers,
Stan H.
--------
RELATED QUESTIONS
If the probability that I get a lift to work on any morning is 0.6 what is the... (answered by Edwin McCravy)
Each morning a waitress either walks, cycles or takes the bus to her workplace. The... (answered by ewatrrr)
A teacher administers a test on any day in the week (5 school working days). So the... (answered by richwmiller)
A can do a work in 12 days ;B in 6 days and C in 3 days.A and B start working together... (answered by Edwin McCravy)
Emp 1 : mon: present ,tue: present ,wed:present ,thur: present ,fri :present... (answered by rothauserc)
Can you help me with this? I calculated the first part, but I am struggling with this... (answered by psbhowmick)
The following probability distribution represents the probability of a randomly selected... (answered by stanbon)
Jackson goes to the gym 0, 2, or 3 days per week, depending on work demands. The expected (answered by ikleyn)
A few children working together can do a piece of work in 18 days. If the number of... (answered by josgarithmetic)