how many selections of 4 balls can be made from 5 red balls and 4 green balls if balls of the same colour are different in size
Answers
Given : 5 red balls and 4 green balls
balls of the same colour are different in size
To Find : how many selections of 4 balls is possible
Solution:
balls of the same colour are different in size
Hence Each ball is unique
so Total number of balls = 5 + 4 = 9
Out of 9 balls 4 balls needs to be selected
Hence number of ways = ⁹C₄
= 9!/5!.4!
= 9 * 8 * 7 * 6 / ( 4 * 3 * 2 * 1)
= 9 * 7 * 2
= 126
There are 126 ways to select 4 balls from 5 red balls and 4 green balls if balls of the same colour are different in size
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Answer:
126
Step-by-step explanation:
answer answer is given in the attachment below...
