Answer:
Step-by-step explanation:
its a lcm question
Answer: B.
.
Step-by-step explanation:
Given : Number of blue disks =4
Number of green disks = 8
Total disks = 12
Total number of combinations of drawing any 3 disks from 12 = 
Number of combinations of drawing 1 blue and 2 green disks = 
Now , the probability that 1 of the disks selected is blue, and 2 of the disks selected are green will be :

Hence, the correct answer is B.
.
Answer:
What in the world is this even for?
The volume of a sphere with a radius of 5cm is V≈523.6
You just need to plug the values: you have to multiply
and
, and then divide the result by -3.
So, if
, we have 
Which means that 
And the final answer is 