Answer:
6.4
Step-by-step explanation:
Answer:
Let X be the number of customer purchased coffee
Let Y be the number of customer purchased donuts
Then
is the number of customer purchased both coffee and donuts
is the number of customer purchased both coffee or donuts
<em><u>The Number of customers purchased only Coffee:</u></em>
Number of customers purchased only donuts =n(X -Y)

n(X-Y) = 59 -16
n(Y - X) = 43
<em><u>The Number of customers purchased only donuts:</u></em>
Number of customers purchased only donuts =n(Y -X)

n(Y - X) = 39 -16
n(Y - X) = 23
<u>The Number of customers did not purchase either of these items:</u>
Number of customers did not purchase either of these items = 
First lets find 



=
= 28
When you have to repeatedly take the same test, with constant probability of succeeding/failing, you have to use Bernoulli's distribution. It states that, if you take
tests with "succeeding" probability
, and you want to "succeed" k of those n times, the probability is

In your case, you have n=18 (the number of tests), and p=0.3 (the probability of succeeding). We want to succeed between 8 and 12 times, which means choosing k=8,9,10,11, or 12. For example, the probability of succeeding 8 times is

you can plug the different values of k to get the probabilities of succeeding 9, 10, 11 and 12 times, and your final answer will be

Answer:
-32
Step-by-step explanation:
-2^3= -8
-2^2= 4
=-8x4=-32
33=17x-18 add 18 both sides
51=17x. divide 17 both sides
3 = x