Math Problem Statement

Cade is filling out summer job applications, so that he can earn money to buy a car. Of the 5 job he's applying for, 3 are babysitting jobs. If Cade randomly picks 5 applications to submit today, what is the probability that exactly 3 of the chosen applications are for babysitting jobs?

Solution

The image contains a probability problem involving a scenario where Cade is filling out summer job applications. Here's a detailed breakdown:

Problem:

  1. Cade is submitting 5 applications.
  2. The probability that each of his applications gets a job offer is 61% (or 0.61).
  3. You are asked to calculate the probability that 3 out of the 5 applications result in job offers.
  4. The result should be given as a decimal rounded to four decimal places.

Solution Approach:

This is a binomial probability problem where:

  • n=5n = 5 (the number of trials, i.e., applications submitted)
  • k=3k = 3 (the number of successes, i.e., job offers)
  • p=0.61p = 0.61 (the probability of success for each trial, i.e., getting a job offer)
  • q=1p=0.39q = 1 - p = 0.39 (the probability of failure for each trial, i.e., not getting a job offer)

The binomial probability formula is:

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

Where:

  • (nk)\binom{n}{k} is the binomial coefficient calculated as:

(nk)=n!k!(nk)!\binom{n}{k} = \frac{n!}{k!(n-k)!}

I will now compute this probability.The probability that Cade will receive job offers for exactly 3 out of the 5 applications is 0.3452, rounded to four decimal places.

Would you like any more details or have any further questions?

Here are 5 related questions you might explore:

  1. How do you calculate the probability of receiving offers for exactly 4 out of 5 applications?
  2. What is the probability that Cade receives at least one job offer from his 5 applications?
  3. How does the probability change if the chance of getting a job offer increases to 70%?
  4. What if Cade submits 7 applications instead of 5? How does this affect the probability for 3 offers?
  5. How do you calculate the expected number of job offers Cade will receive?

Tip: In binomial probability problems, it's useful to identify whether you need the probability for "exactly," "at least," or "at most" a certain number of successes. These nuances affect the approach!

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Math Problem Analysis

Mathematical Concepts

Probability
Binomial Distribution

Formulas

P(k) = C(n, k) * p^k * (1 - p)^(n-k)
C(n, k) = n! / [k!(n-k)!]

Theorems

Binomial Probability Theorem

Suitable Grade Level

Grades 9-12