A room contains 80 sophomores of which 39 are males and 41 are females. There are also 69 juniors of which 36 are males and 33 are females. You pick 3 students at random. What is the probability that all 3 are males?

  1. 👍
  2. 👎
  3. 👁
  1. total males: 39+36=75
    total students: 80+69=149

    you are basically just selecting without replacement, so

    P(3 males) = 75/149 * 74/148 * 73/147

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Bio

    In Drosophila, sepia colored eyes are due to a recessive allele s and wild type (red eye color) to its dominant allele s+. Sepia-eyed females are crossed to pure wild type males. What phenotypic and genotypic ratios are expected

  2. Health

    Which is a true statement about gender roles? A. Gender roles are basically the same across all cultures. B. Male-female friendships are more difficult to develop today than they were in earlier generations. C. Most people look

  3. math

    1) If 9 and 12 each divide Q without remainder, which of the following must Q divide without remainder? A)1 B)3 C)36 D)72 E)The answer can't be determined from the given info ^I got B 2) If mn does not equal 0, then 1/n^2 times

  4. statistics

    An introductory psychology class has 9 freshman males, 15 freshman females, 8 sophomore males, and 12 sophomore females. If one student is randomly selected from this class, what is the probability of selecting a female? Round to

  1. statistics

    Miller (2008) examined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon, suppose a researcher selects a

  2. math

    at a baseball game, there were three times as many males as females. 5/6 of the males were boys and the rest were men. 2/3 of the females were girls and the rest were women. Given that there were 121 more boys than girls, how many

  3. science help plzzz

    Multiple Choice 1. At the chromosomal level, what is the difference between human males and human females? (1 point) All males have a Y chromosome, and females do not. All males have an X chromosome, and females do not. All males

  4. statistics

    In an extensive study involving thousands of British children, Arden and Plomin (2006) found significantly higher variance in the intelligence scores for males than for females. Following are hypothetical data, similar to the

  1. Math

    The chart below shows the population distribution for the 2,400 occupants of the city of Centre Hill. Adult Male Adult Female Child % Living in Uptown 9 8 6 % Living in Midtown 22 20 15 % Living in Downtown 21 22 12 % Living in

  2. Life Span Development

    1. In adolescence and early adulthood, males and females begin to spend more time in mixed-gender groups. Studies of who has more influence on the outcome of problem solving in mixed-gender groups indicate that: A. Females have an

  3. Biology

    1. A version of a gene is called a(n) karyotype. autosome. allele. phenotype. 2. If a father is affected by an X-linked dominant condition and the mother is not, which children can inherit the condition? only males both males and

  4. biology

    In a cross with a mother who carries the allele for hemophilia and a father who has normal blood clotting what would be the expected phenotypes of the offspring? A. all females normal, all males normal B. all females normal, all

You can view more similar questions or ask a new question.