Answer:
The z statistic is 0.23.
Step-by-step explanation:
Test statistic (z) = (sample mean - population mean) ÷ sd/√n
sample mean = 104 mg
population mean (mu) = 100 mg
sd = 55 mg
n = 10
z = (104 - 100) ÷ 55/√10 = 4 ÷ 17.393 = 0.23
Probability<span>: </span>Complement<span>. </span>Complement<span> of an </span>Event: All outcomes that are NOT theevent<span>. So the </span>Complement<span> of an </span>event<span> is all the other outcomes (not the ones we want). And together the </span>Event and its Complement<span> make all possible outcomes.</span>
400,000,000 + 20,000,000 + 8,000,000 + 200,000 + 50,000 + 200 + 30
Using the <u>arrangements and the probability concept</u>, it is found that there is a 0.75 = 75% probability that the number formed is not divisible by 4.
- A probability is the <u>number of desired outcomes divided by the number of total outcomes</u>.
- The number of possible arrangements of n elements is given by

In this problem, there are 4 elements, hence
.
A number is a multiple of 4 if the <u>number composed by it's last 2 digits are multiples of 4</u>.
- Hence, the possible options for the last 2 digits are: 56, 68, 76.
- For each of them, there are
options for the first 2 digits, hence, there will be 2 x 3 = 6 multiples of 4.
The other 18 numbers formed are not divisible by 4, hence:

0.75 = 75% probability that the number formed is not divisible by 4.
For more on <u>arrangements and probabilities</u>, you can check brainly.com/question/24437717
Answer:
7 in each book set
Step-by-step explanation:
26+9= 35 (total # of books)
35/5= 7 ( # of books in a book set)