Explore BrainMass
Share

Explore BrainMass

    Mixed Probability Questions

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Solve the following problems showing your work:

    1. In a poll, respondents were asked whether they had ever been in a car accident. 157 respondents indicated that they had been in a car accident and 117 respondents said that they had not been in a car accident. If one of these respondents is randomly selected, what is the probability of getting someone who has been in a car accident?

    2. In a certain class of students, there are 12 boys from Wilmette, 3 girls from Kenilworth, 9 girls from Wilmette, 6 boys from Glencoe, 2 boys from Kenilworth and 6 girls from Glencoe. If the teacher calls upon a student to answer a question, what is the probability that the student will be from Kenilworth?

    3. Find the probability of correctly answering the first 2 questions on a multiple choice test if random guesses are made and each question has 5 possible answers.

    4. Of 1936 people who came into a blood bank to give blood, 200 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure.

    © BrainMass Inc. brainmass.com October 10, 2019, 2:46 am ad1c9bdddf
    https://brainmass.com/math/probability/mixed-probability-questions-393403

    Solution Preview

    1. P(accident)
    = CountAccident / CountTotal
    = 157 / (157 + 117) = 157 / 274 = 0.573 = 0.573 * 100% = 57.3%

    2. P(Kenilworth)
    = CountKenilworth / CountTotal
    = (3 girls + 2 boys) / ...

    Solution Summary

    The solution provides answers to four probability questions and shows the steps of the calculations.

    $2.19