CBSE Guess > Papers > Important Questions > Class XII > 2010 > Maths > Mathematics By Mr. M.P.Keshari Probability Q.4. Two unbiased dice are tossed simultaneously. Find the probability that the sum of the numbers will be a multiple of 3 or 5. Solution : We have, Let event A = Multiple of 3 = {(1, 2), (1, 5), (2, 1), (2, 4), (3, 3), (3, 6), Q.5. Two unbiased dice are thrown. Find the probability that the sum of the numbers obtained on the two dice is neither a multiple of 3 nor a multiple of 4. Solution : Total number of cases = 6 × 6 = 36. 13.2. Multiplication Theorem on Probability/Independent Events. Q.1. There are two bags. The first bag contains 4 white and 2 black balls, while the second bag contains 3 white and 4 black balls. A ball is picked up at random and a ball is drawn out. Find the probability that it is a white ball. Solution :
Probability of picking up any bag = 1/2. Q.2. In a group of 9 students, there are 5 boys and 4 girls. A team of 4 students is to be selected for a quiz competition. Find the probability that there will be 2 boys and 2 girls in that team. Solution : We have, no. of boys = 5, no. of girls = 4.
Paper By Mr. M.P.Keshari |
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