An urn contains 5 defective and 7 non-defective bulbs
MATHEMATICS · Single correct · CBSE · Mathematics · Probability · Probability
Problem
An urn contains 5 defective and 7 non-defective bulbs. Three bulbs are drawn successively without replacement. What is the probability that at least one of the three bulbs drawn is defective?
(a) 4421
(b) 13237
(c) 4437
(d) 447