Answer:
Step-by-step explanation:
Given that a university found that 20% of its students withdraw without completing the introductory statistics course.
Each student is independent of the other and there are only two outcomes
X no of students in the registered 20 is binomial with p = 0.2
a)the probability that two or fewer will withdraw.
=
b. Compute the probability that exactly four will withdraw.
=
c. Compute the probability that more than three will withdraw.

d. Compute the expected number of withdrawals.
E(x) = np = 4
W + d = 770
w = d + 70
d + 70 + d = 770
2d + 70 = 770
2d = 770 - 70
2d = 700
d = 700/2
d = 350 <=== cost of dryer
Answer:
set both equations equal to each other.
Step-by-step explanation:
5x+4 = 8x-20
-5x. -5x
-----------------
4= 4x - 20
+20 +20
------------------
24÷4 = 4x÷4
6= x
It should take kam 45 minutes to mow her lawn.... I think
Answer:
Step-by-step explanation:
What the hell is that