Pre-Calculus-check answers

posted by Lucy

How many ways can 5 students be chosen from a group of 4 juniors and 6 seniors to be on the prom committee if exactly 3 students must be seniors?

Answer: 5400

Find the probability of getting a sum of 5 on the first toss of two number cubes and a sum of 6 on the second toss.

Answer: 1/54

Solve e^sqrtx=4

Answer: x=1.92


  1. Reiny

    1. the 3 seniors can be chosen i C(6,3) ways, which is 20
    that leaves 2 juniors to be choses from the 4 juniors, which is 6

    so the number of ways is 20x6 or 120 ways

    2. there are 4 ways to get a 5, (1,4),(2,3),(3,2), and (4,1)
    so prob of a 5 = 4/36 = 1/9
    similarly there are 5 ways to get a 6.
    so the prob of a 5 followed by a 6
    = 1/9 x 5/36 = 5/324

    3. correct

  2. Anonymous


  3. shi


Respond to this Question

First Name

Your Answer

Similar Questions

  1. Pre-Calculus

    Consider a class with 10 sophomores, 8 juniors, and 6 seniors. Two students are selected at random. 1) What is the probability of selecting 1 junior and 1 senior. 2) Find the odds of selecting two students who are not seniors. How …
  2. Probability - Check

    Could someone check these answers for me. Thanks 1. (3x+y)^7 = 2187x^7 + 5103x^6y + 5103x^5y^2 + 8505x^4y^3 + 2835x^3y^4 + 567x^2y^5 + 63xy^6 + y^7 2. Eight people are boarding an airplane. Two have tickets for first class and board …
  3. geometry

    the ratio of juniors to seniors is 9 to 8, if there are 51 juniors and seniors total, which percent of students are seniors?
  4. math

    there is 2 freshmen, 4 sophomores, 8 juniors, and 15 seniors. A local television station wants to interview 8 students from the team. How many different ways can exactly 4 seniors and 4 juniors be selected for the interview?
  5. Math

    A club consists of 8 seniors, 7 juniors, and 4 sophomores. A subcommittee consisting of 3 seniors, 2 juniors, and 1 sophomore will be chosen. How many different such subcommittees are there?
  6. statistic

    here are five seniors in a class, for each situation, write how the binomial formula is used to calculate the probability. a) In how many ways can you choose one senior to represent the group?
  7. Algebra 2

    Amanda surveyed 20 juniors and seniors at Delamar high school to find the number of hours per week they spend working at part-time jobs. Her results are shown below. Juniors: 20,10,20,10,15,0,0,10,20,15 Seniors: 20,20,10,10,0,0,0,10,0,10 …
  8. Math

    A college class with 30 sophomores, 18 juniors, and 12 seniors is divided into project groups where each group has the same number of sophomores, juniors, and seniors. What is the greatest number of groups that can be formed?
  9. Math

    From a pool of six juniors and eight seniors three co captains will be chosen for the football team. How many different combinations are possible if one junior and two seniors are chosen?
  10. Algebra 2

    Amanda surveyed 20 juniors and seniors at Delmark Highschool to find the number of hours per week they spend working at part time jobs. Her results are shown below Junior - 20,10,20,15,0,0,10,20,15 Senior - 20,20,10,10,0,0,0,10,0,10 …

More Similar Questions