RE: A set S is composed of 20 multi-colored objects
March 21, 2020 at 4:03 pm
(This post was last modified: March 21, 2020 at 4:05 pm by polymath257.)
There are three types of people: those you can count, and those who can't.
Probabilities are all about counting.
OK, steps for a solution:
1. Determine how many ways there are for picking out three blue objects.
2. Determine how many different ways there are to pick out four objects.
3. Divide the result from 1 by the result from 2.
Probabilities are all about counting.
(March 18, 2020 at 5:19 am)WinterHold Wrote: I have a probability question that I need to solve:
A set S is composed of 20 multi-colored objects. 4 objects were chosen randomly from S.
What is the probability that 3 of the chosen objects be blue; knowing that there are 8 blue objects in S ?
So, I don't need hell loads of math theory. I only want steps for a solution and I'll be thankful.
Please help me.
OK, steps for a solution:
1. Determine how many ways there are for picking out three blue objects.
2. Determine how many different ways there are to pick out four objects.
3. Divide the result from 1 by the result from 2.
