Post a New Question

Math

posted by .

Mack rolls a 15-sided cube 45 times, what would you predict the probability to be of Mack's rolling a number less than 5?

  • Math -

    The concept of a 15 sided cube startles me.
    Did you make this question up yourself?

  • Math -

    No, it's a question on a 7th grade Skills Review

  • To Damon -

    You are right; there's no way a 15-sided die could be fair. Even if the area of each face is the same, the angles cannot all be equal, since there is no regular 15-hedron.

  • Math -

    Perhaps they want us to assume it is possible.
    4 out of the 15 sides are less than 5
    so
    about 4/15 in each roll
    so in each roll the probability of NOT getting less than 5 is 11/15
    so the probability of NEVER getting less than 5 is (11/15)^45
    so our answer is
    1 - (11/15)^45

    which is about
    1 - 8.7^-7

    which is so close to one that you can count on it :)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra

    Mack is 3 times as old as Justin. In 3 years, Mack's age will be 5 more years more than 2 times as old as Justin. How old are Mack and Justin?
  2. algebra

    cube labeled 1 to 6 rolls 450 times. predict rolling less than 3
  3. Math 221 Week3

    A probability experiment consists of rolling a 6 sided die. Find the probability of the event below: rolling a number less than 3?
  4. MATH PLEASE HELP

    A single, standard number cube is tossed. What is the probability of getting a number other than 6?
  5. Math

    1. What is the probability of rolling a number less than or equal to 6 when rolling a six-sided number cube?
  6. math

    What is the probability of getting an even number when rolling a six-sided number cube?
  7. Math Please Help

    What is the probability of getting an even number when rolling a six-sided number cube?
  8. math !

    1)You roll a 6-sided number cube twice. Find P(3, then even). Write the probability as a fraction in simplest form. 2)Sasha visits the ice cream parlor and asks the server to randomly choose her bowl color, ice cream flavor, and topping …
  9. math

    John is about to roll a six-sided, fair number cube 60 times. He wants to predict how many times the cube will land on an even number. He makes a prediction of 20 times. Is it a good prediction?
  10. Math Help ASAP!!!

    1. a standard number cube is rolled 180 times. Predict how many times a 3 or 5 will be the result. 31 times 60 times*** 57 times 30 times 2. A number cube is rolled 360 times, and the results are recorded as follows: 61 ones, 26 twos, …

More Similar Questions

Post a New Question