Answer:
look it up on a calculator
Step-by-step explanation:
What exactly are you looking for?
Answer:
a) 0.00563
b) 1
c) 0
Step-by-step explanation:
Total = 40+30+20 =90
a) (20C8×30C6×40C6)/90C20
= 0.00563
b) 1 - (no chocolate + 1 chocolate)
1 - [(50C20) + (40C1×50C19)]/90C20
1 - 0.00002478
= 0.9999752187
c) [40C20+20C20+30C20]/90C20
= 0.0000000027045
Answer:

Step-by-step explanation:
By definition:
The pre-meter P of a triangle ABC is equal to the sum of the length of its sides.
We know that:

The perimeter is:

Now we find the length of the sides:

Once the length of the sides is known, we use Heron's formula to calculate the area.
First I find the semiperimeter S.

Then the Area is:
