Answer:
Mean = 3.4
Variance = 1.088
Standard deviation = 1.0431
Step-by-step explanation:
The mean of a binomial distribution with parameters N (the number of trials) and p (the probability of success for each trial) is
Thus,
The variance of the binomial distribution is , where is the variance of the binomial distribution, so
The standard deviation is the square root of the variance so
3 Hours
4 People does the job in 6 hours if there are twice as many people it gets done twice as fast
.45 is just 45/100. divide both numbers by 5 to get 9/20.
The second one because 1.5 is not perpendicular to 1.1