Question

A box contains 8 black beads and 12 white beads another box contains 9 black beads and 6 white bead one bead from each box is taken A what's the probability that both beads are black B what is the probability of getting one blackbead and one white bead

Answer 1

First box contains 8 black beads and 12 white beads and second contains 9 black box and 6 white beads. One bead from each box is taken . Number of such cases where both the beads are black = 9×8 = 72. Now, probability = 72/300 = 6/25.