MATHEMATICS · Single correct · CBSE · Mathematics · Probability · Probability
Problem
A bag contains red, blue and green beads. There are 18 red beads, and the probability of drawing a blue bead is twice the probability of drawing a green bead. If the probability of drawing a red bead is 103, how many blue beads are in the bag?
(a) 14
(b) 28
(c) 21
(d) 36