Question

A box contains 6 red 4 white and 5 black balls a person draws for boys from the box at random find the protein that among the balls drawn there is at least one ball of each colour

Answer 1

the probability of getting red ball=6/15
the probability of getting white ball = 4/15
the probability of getting black ball =5/15




I hope it will help u

Answer 2

Answer:

699/1365

Step-by-step explanation:

# of ways to get 4 balls with no two of the same color::

# of red/white + red/black + white/black  

10C4 + 11C4 + 9C4 = 210 + 330 + 126 = 666 ways

# of ways to get 4 balls WITH some balls of the same color:: 1365-666 = 699

P(4 with at least one of each color) = 699/1365