A carton contains light bulbs of which are defective and are in good condition
MATHEMATICS · Multi-part · GCSE · Mathematics · Probability · Probability
Problem
A carton contains 12 light bulbs of which 4 are defective and 8 are in good condition. An inspector selects three bulbs one after another without replacement. Answer the following.
(i) Calculate the probability that all three selected bulbs are good.
(ii) Determine the probability that exactly one defective bulb is obtained in the selection of three.
(iii) Find the probability that at least one defective bulb is obtained in the three selections.