Soundtronics is a company that manufactures inexpensive headphones at a high volume. Due to the high production rate, some of th
e headphones are defective when they come off of the production line. The probability that a set of headphones is defective is 0.39%. Find the probability that one of the first 30 sets of headphones are defective. A.11%
B.12%
C.70%
D.99%
Soundtronics is a company that manufactures inexpensive headphones at a high volume. Due to the high production rate, some of the headphones are defective when they come off of the production line. The probability that a set of headphones is defective is 0.39%.
Let X be the no of defectives in the set of 30 sets.
THen since each set is independent of the other and if being defective is considered as a success,
then X is binomial with
The probability that one of the first 30 sets of headphones are defective.