The Total solution for NCERT class 6-12
Answer - 11 : -
Answer - 12 : -
Theremachines E1, E2, E3 in a certain factoryproduce 50%, 25% and 25% respectively, of the total daily output of electricbulbs. It is known that 4% of the tubes produced one each of machines E1 andE2 are defective, and that 5% of those produced on E3 aredefective. If one tube is picked up at random from a day's production, calculatethe probability that it is defective.
Answer - 13 : -