: A lot ofoo bulbs from a manufe turin xample nq process is known to Cor 2o defective and 8 non defective bulbs If 3 bulbs are selecked at vandom , what tain tun is the probablty that (i) there will be 2 defective and b non-defect- lve bulbs (i) there will be at least one defective bulb Solution: Since out of loo bulbs , 2o are dePective and 80 an non - de fectve
Therefore Probability ef drawing defechue. ereore pro bulb when one dlefeetve bulb is selected is given bl P=Zoo-L is the probability that a bulb Selected is non defechve Here 8 bulbs ae selected, therefore.
o8bulbs are pre bbt ta t 3 bulbs are roba ! Selected 1) 2 are defective qnd 6 are non-dekchv are mon -defechve is IS aiven 2 21 (8-2)]
4 688 34062S robn lailiy that o bulb wil be defective
probability that at least ohe bulb will be dle Fechive e ective. 3250 89 34D GS
my name is Aishwarya Vitthal Hase. i am currently studying in fourth Year B tech engineering in Elecronics and telecommunication branch.