Q: What is the probability that a bottle selected at random is nonconformining?

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probability = 2/7 to be exact, 28/97 (about 28.87%)

6 out of 30 ie 20% or 0.2

Approx 0.0287

There is only one girl out of 12 students so the probability that the girl is selected is 1/12.

That is known as a simple random sample, or SRS.

Related questions

The probability is 10 percent.

1/365 = 0.00274

It depends on what the random variable is, what its domain is, what its probability distribution function is. The probability that a randomly selected random variable has a value between 40 and 60 is probably quite close to zero.

probability = 2/7 to be exact, 28/97 (about 28.87%)

random sample

When each member of the population has the same probability of being selected as a member of the sample.

The probability is approx 0.81

6 out of 30 ie 20% or 0.2

It is a simple random sample.

This is called a random sample.

Simple random sampling.

Approx 0.0287