Question

Probability of selecting 4 balls of 4 different coulours from infite number of balls

Answer 1

Answer:

infinity

Step-by-step explanation:

I hope this will help u

Answer 2

Answer:

Let us say that we have selected 'x1' blue balls, 'x2' red balls, 'x3' white balls and 'x4' grey coloured balls.

This means, x1+x2+x3+x4 = 12

Now, for an intance, 1+2+3+6 can be an answer. 0+0+0+12 can also be another answer

Hence, we need to find the non-negative integral solution for the equation

x1+x2+x3+x4 = n is

(n+k-1)C(k-1)

Here, n=12 and k=4

(12+4-1)C(4-1) = 15C3 = 455