Table of Contents
How many ways can 3 balls be arranged?
If we now had to choose 3 balls instead, it would be 53 permutations. In general, if we have n balls and we want to choose r balls with repetitions we have nr different permutations.
How many ways can 4 balls of the same Colour be selected?
Balls of same colour are non-identical. Finally chosen 4 balls must contain at least one red, one white and one black ball each. This process can occur in (2C2)*(3C1)*(4C1) = 1*3*4 = 12 ways. This process can occur in (2C1)*(3C2)*(4C1) = 2*3*4 = 24 ways.
What is the probability of getting a white ball?
Therefore the probability of getting a white ball is 7/20. Therefore the probability of getting a black ball is 1/5.
What is the probability of drawing a white ball?
The probability of selecting a white ball from the first bag and a black ball from the second bag is (4/6)(5/8) = 10/24. The probability of selecting a black ball from the first bag and a white ball from the second bag is (2/6)(3/8) = 3/24.
How many combinations of 3 colors are there?
six combinations
As you can see, there are six combinations of the three colors….
| Number | First | Second |
|---|---|---|
| 1 | red | yellow |
| 2 | red | green |
| 3 | red | brown |
| x | yellow | red |
How many combinations are there with 11 numbers?
See for 11 numbers there can be 9 ways for each number for 1st nine places since 0 can’t be the fist number and next two are repeated from 10 numbers hence 10!/2! So 99 combinations have 10!/2! Permutations hence total ways are 99*10!/2!
What is the probability of white balls?
How many ways of selecting two balls of the same Colour from 3 red and 4 black balls are there?
in 9 Ways two balls of the same colour can be selected out of 4 distinct black and 3 distinct white balls.