The answer is 20 because you dive it
In this item, it is not given that there has to be specific arrangement or order as to how the questions are going to be answered. Hence, the concept that can be used in order to answer this item is the concept of combination which states that,
nCr = n! / (r!)(n - r)!
This is read as "combination of n taken r". In this item, n = 10 and r = 4. Substituting the known vaues to the equation,
10C4 = (10!) / (4!)(10 - 4)!
10C4 = 210
Therefore, the number of which is which the questions can be answered is 210.
Not enough information is that all of the question?
Answer:
There are 271.74 ft^2 not covered by the rug
The percentage not covered by the rug is 90.58%
Step-by-step explanation:
step 1
Find out the area of the room
The area of the rectangular room is

step 2
Find out the area of the circular rug
The area of the circle is

we have

----> the radius is half the diameter
substitute


step 3
Find out what percentage of the room is not covered by the rug
we know that
300 ft^2 represent the 100%
so
using proportion
Find out what percentage represent the difference (300-28.26)=271.74 ft^2
Let
x ----> the percentage not covered by the rug

Convert to fraction form

Simplify

therefore
There are 271.74 ft^2 not covered by the rug
The percentage not covered by the rug is 90.58%
Answer:
Denote 3 consecutive numbers as: (n-1), n, (n+1)
=> n - 1 + n + n + 1 = 498
=> 3*n = 498
=> n = 166
=> n + 1 = 166 + 1 = 167
=> 3rd number is 167