What is the exact circumference of a circle with a radius of 15 cm?
2 answers:
Answer: C: 30π cm
Step-by-step explanation:
The circumference of a circle is given by :-
, where r is the radius of the circle.
We are given that : The radius of the circle = 15 cm
then , the circumference of the circle will be :-
Therefore, the exact circumference of a circle with a radius of 15 cm =
Thus , the correct option is C: 30π cm
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For each chip, there are only two possible outcomes, either it is defective, or it is not. The probability of a chip being defective is independent of any other chip, hence, the binomial distribution is used to solve this question.
Binomial probability distribution
Probability of exactly <u>x successes on n repeated trials, with p probability.</u>
The mean of the binomial distribution is:
The standard deviation of the binomial distribution is:
In this problem:
- Six percent of computer chips produced by Cheapo Chips are defective, hence
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- Each month a random sample of 200 chips manufactured that month are taken, hence
Then:
The mean of X is of 12, with a standard deviation of 3.36.
A similar problem is given at brainly.com/question/12473640