D is the answer to your question
<u>Solution and Explanation:</u>
a) 51% of users of mobile phones use their phone at least once per hour,
It is a binomial distribution with n = 150, p = 0.51
mean = np = 150 multiply with 0.51 = 76.5
SD= sqrt(np(1-p) )= 6.1225
Since np and n(1-p) > 5, we can assume the distribution is normal.
B) please see the attached file.
c) It is a binomial distribution with n = 150, p = 0.02
mean = np = 150*0.02 = 3
SD= sqrt(np(1-p) )= 1.71464
Since np < 5, we cannot assume the distribution is normal.
Answer:
$2.45
Explanation:
The formula to compute the marginal revenue is shown below:
Marginal revenue = Change in total revenue ÷ Change in number of quantity sold
where,
Change in total revenue would be
50 burgers × $5 = $250
51 burgers × $4.95 = $252.45
So, the change in total revenue is
= $252.45 - $250
= $2.45
And, the change in number of quantity sold is
= 51 burgers - 50 burgers
= 1
So, the marginal revenue is
= $2.45 ÷ 1
= $2.45
<span>Objective, Introduction, Instruction, Practice, and Conclusion</span>