A-bowl-contains-carefully-shredded-confetti-6-of-which-are-blue-and-the-remaining-12-are-red-Each-piece-of-confetti-is-either-circular-triangular-or-rectangular-in-shape-and-are-in-the-ratio-1-3

Question Number 135998 by nadovic last updated on 17/Mar/21

A bowl contains carefully shredded confetti, 6 of which are blue and the remaining 12 are red.

Each piece of confetti is either circular, triangular or rectangular in shape and are in the ratio 1:3:2, for each colour, respectively.

If they are thrown up thrice in a competition and contestant picks one at random on each throw, what is the probability that

(a) he picks a different shape on each throw?

(b) on the second throw, he picks a triangular piece which is red in colour?