alexiannaa
24.06.2019 •
Mathematics
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%. find the probability that one of the first 30 sets of headphones are defective. a.11% b.12% c.70% d.99%
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Ответ:
The correct answer is 11%
Ответ:
10.44%
Step-by-step explanation:
Given that
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.
=30C1pq^29
=0.1044
No option given matches with this
Answer is 10.44%
Ответ:
A
Step-by-step explanation: