math

posted by .

Suppose there are 21 students in your class. If the teacher draws 2 names at random, what is the probability that you and your best friend will be chosen?

2/21
1/20
1/105
2/10

  • math -

    A specific two names out of 21? What do you think?

  • math -

    Mine had different possible answers, mine was 1/210. I'm not sure how it got there but that's what it was. Sorry i prob didn't help much.

  • math -

    I ran into the exact same problem. PsyDAG was wrong because by taking out either you or your friend. That means there are less people, changing the possibility for the one left behind. The answer is 2/10 i think.

  • math -

    its 1/210

  • math -

    Its 1 1/210 I just answered it on switched on schoolhouse, Hope this helps!!! (:

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. statistics

    I have an ordianry deck of 52 cards, which has 26 red and 26 black cards. A friend shuffles the deck and draws cards at random, replacing the card and reshuffling after each guess. I attempt to guess the color of each card. A. what …
  2. Math

    Your teacher has a large box containing an equal number of red and blue folders. There are 24 students in your class. The teacher passes out folders at random. Ten students receive a red folder. Compare the experimental probability …
  3. math

    There are 10 girls and 6 boys in a class. The teacher randomly draws one student's name and then draws another. What is the probability that the first name drawn will be a boy and the second will be a girl?
  4. Math

    Can someone guide me with this question? Four teachers and five students have volunteered to serve on the school's fundraising committee, which is chaired by the principal. The principal wishes to select the committee using a random
  5. statistics

    A sixth form class consists of 6 girls and 9 boys. Three students from the class are chosen at random. The number of boys chosen is denoted by the random variable X. Show that a)P(X=0)=120/2730 b)P(X=2)=1296/2730
  6. statistics

    suppose 45 students in an organization are male and 55 are female. Ten females and 15 males in the organization are graduating students. What is the probability that a: a.) student chosen at random is male or a graduating student?
  7. statistics

    In a class of 100 students, 30 are computer science majors, 49 are mechaincal engineering majors, 13 are civil engineers and the rest are general engineering majors. Assume students only have one major. If a student is chosen at random …
  8. Math

    Forty-five percent of a large class of students in Statistics are females. Suppose 28 students are selected at random from the class. Use a normal approximation with continuity correction to calculate the probability that the number …
  9. math

    Jason, Erik, and Jamie are friends in art class. The teacher randomly chooses 2 of the 21 students in the class to work together on a project. What is the probability that two of these three friends will be chosen?
  10. Probability

    suppose 45 students in an organization are male and 55 are female. Ten females and 15 males in the organization are graduating students. What is the probability that a: a.) student chosen at random is male or a graduating student?

More Similar Questions