20% of Aussies have blue eyes. If 4 Aussies in a play group have blue eyes, how many Aussies are in the group?
2 answers:
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Answer:
A shows the correct set of equation.
Late books = 12/100 x 462
Total fines = late books/4.25
Step-by-step explanation:
Total number of books issued = 462
Fine on late books = $4.25 per book
12% of the issued books are late returned.
So, the number of the books that are returned late here= 12% of 462
Late books =
Also, Since fine on each late book = $4.62
The fine on late books = Total number of late books x ($4. 62)
So, A. is the correct option
Answer:
For the student who is studying 10 hours a week is in the 57.93th percentile.
Step-by-step explanation:
Corresponding z-score for the student who studies 10 hours a week can be calculated by the formula
z= where
- x is the hours student work in a week, which is 10,
- M is the mean studying hour of the class, which is 9.92,
- s is the standart deviation which is 4.54
from here we find that z=≈0.2
Corresponding percentile for z=0.2 is 57.93