Probability (Pre-Calculus)

posted by .

A class is given a list of eight study problems from which five will be part of an upcoming exam. If a given student knows how to solve six of these problems, find the probability that the student will be able to answer:

(a) all five questions on the exam.
(b) exactly eight questions on the exam.
(c) at least nine questions on the exam.

No matter what I try -- permutations, combinations, random multiplying and dividing -- I can't figure any of these parts out. I don't even know where to start, really.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. statistics and probability

    It is known that an exam scores of students in STAT 2507 follow a normal distribution with a mean of 70% and a standard deviation of 9%. (A) If a student must obtain a mark of 50% to pass the exam, what proportion of students fail …
  2. statistics

    A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly?
  3. Math

    A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly?
  4. statistics

    in a class of 28 students, each student has a 90% chance of attending any given class and student act independently. what is the probability that tomorrow's class has perfect attendance?
  5. Math Help

    Suppose that each student in stat. has a 9% chance of missing class on any given day and that student attendance is independent. In a stat. class of 20 students, find the probability that: 1) no student is absent 2) one student is …
  6. Check answers please Statistics

    Suppose that each student in stat. has a 9% chance of missing class on any given day and that student attendance is independent. In a stat. class of 20 students, find the probability that: 1) no student is absent =15.16 2) one student …
  7. Statistics

    1. In a certain game, the probability of getting a red outcome is 0.03. Find the probability of getting an outcome that is not red?
  8. probability

    On a typical scantron exam, there are 4 choices for each problem (a, b, c, or d). If you are given an exam with 6 problems and you guessed randomly, what is them probability of getting at least half the problems right?
  9. Probability

    Suppose a math class contains 46 students, 22 females (six of whom speak French) and 24 males (three of whom speak French). Compute the probability that a randomly selected student speaks French, given that the student is male.
  10. comparing fractions

    A third grade class was given a multiplication quiz. The quiz had 10 problems. Any correctly answered 6 problems, Bobby answered 7 problems correctly, Tom answered 9 problems correctly, and Sue only answered 2 problems correctly. A. …

More Similar Questions