Math Problem Statement

Not all visitors to a certain company's website are customers. In fact, the website administrator estimates that about of all visitors to the website are looking for other websites. Assuming that this estimate is correct, find the probability that, in a random sample of visitors to the website, exactly actually are looking for the website.

Round your response to at least three decimal places. (If necessary, consult a list of formulas.)

Solution

To solve this problem, we need to make use of the binomial probability formula. The problem asks for the probability that exactly kk visitors are looking for the website out of nn total visitors, given that the probability pp of any individual visitor being there for the right reason is known.

Binomial Probability Formula

The probability of exactly kk successes (in this case, visitors looking for the website) in nn trials (visitors) is given by the binomial probability formula:

P(X=k)=(nk)pk(1p)nkP(X = k) = \binom{n}{k} \cdot p^k \cdot (1-p)^{n-k}

Where:

  • P(X=k)P(X = k) is the probability of getting exactly kk successes.
  • (nk)\binom{n}{k} is the binomial coefficient, which represents the number of ways to choose kk successes out of nn trials. It is calculated as (nk)=n!k!(nk)!\binom{n}{k} = \frac{n!}{k!(n-k)!}.
  • pp is the probability of success on any given trial.
  • (1p)(1-p) is the probability of failure on any given trial.

Steps to Solve:

  1. Identify the given values:

    • nn = total number of visitors (this should be provided in the problem).
    • kk = number of visitors actually looking for the website (this should be provided in the problem).
    • pp = probability that a visitor is looking for the website.
  2. Substitute the given values into the formula.

  3. Calculate the result.

Assumptions:

  • It seems like some specific numbers for nn, kk, and pp are missing from the problem statement you provided. Please provide those values so I can calculate the probability for you.

Could you provide those numbers so I can complete the solution?

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Math Problem Analysis

Mathematical Concepts

Probability
Binomial Distribution

Formulas

Binomial probability formula

Theorems

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Suitable Grade Level

Grades 10-12