A box contains 6 white balls and 5 red balls. in how many ways 4 balls can be drawn from the box if

1. They are to be any color

2. All the balls to be of same color.

Solution:

Total balls = 6+5 = 11

Total number of balls in a box is 11.

No of balls drawn is 4.

1] 4 balls of any color = $11C_4 = \frac{11.10.9.8}{1.2.3.4} = 330$

4 balls drawn from the box of any color is 330 balls.

2] All balls to …