A certain manufacturing process yields electrical fuses of which in the Long run 12 1/2% are defective find the probability that in the random sample of 10 fuses there will be no defective and no more than one defective

Probability that a fuse is intact is 0.88 and that it is damaged is 0.12 . We have no issues on that right?

Now , for no defectives, we need to be sure that :

The first one is not defective and the second one is not defective and the third one is not defective and….and the 10th one is not defective.

Which gives the probability of 0.88*0.88*0.88*….*0.88 = (0.858^10.

Probability that atleast one is defective : 1 - (0.88)^10