Answer:
Step-by-step explanation:
Combinatorial explanation:
The n balls have to be arranged in n positions and the only distinction is where are the black and where white balls are.
We can choose the position of black balls in 
ways, therefore, white ones are on the remaining positions.
Using binomial we can have explanation written below:
The balls can be arranged in n! possible permutations.
To be precise one particular arrangement includes 
permutations. Since r black balls can be permuted in r! ways and white balls in (n-r)! different orders.
So basically it yields,
permutations.
So the actual amount is,
Answer:
B
Step-by-step explanation:
Answer:
No
Step-by-step explanation:
The equation of a circle with center (a,b) and radius r is given as:
If a given point (x,y) does not lie on this circle, it will not satisfy its equation.
This means the distance from the point to the center is not equal to the radius.
It is either less or greater than the radius.
Hence you cannot write the equation of the circle.
Answer:
Step-by-step explanation:
arranging in ascending order
45,57,70,72,78
number of terms=5
median=(5+1)/2=3rd
or median =70
Answer:
The correct answer is [C.) 0.04r + 5.00}
Step-by-step explanation:
hope this hlps
