![Four red balls, four green balls and four blue balls are put in a box. Three balls are pulled out of](https://www.gkseries.com/blog/wp-content/uploads/2023/10/Four-red-balls-four-green-balls-and-four-blue-balls-are-put-in-a-box.-Three-balls-are-pulled-out-of.jpg)
Q. Four red balls, four green balls and four blue balls are put in a box. Three balls are pulled out of the box at random one after another without replacement. The probability that all the three balls are red is
(A) 1/72 (B) 1/55 (C) 1/36 (D) 1/27
Ans: 1/55