Erik is rolling two regular six-sided number cubes. What is the probability that he will roll an eve

Discussion in 'Calculator Requests' started by math_celebrity, Jun 4, 2020.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    Erik is rolling two regular six-sided number cubes. What is the probability that he will roll an even number on one cube and a prime number on the other?

    P(Even on first cube) = (2,4,6) / 6 total choices
    P(Even on first cube) = 3/6
    P(Even on first cube) = 1/2 <-- Using our fraction simplify calculator

    P(Prime on second cube) = (2,3,5) / 6 total choices
    P(Prime on second cube) = 3/6
    P(Prime on second cube) = 1/2 <-- Using our fraction simplify calculator

    Since each event is independent, we have:
    P(Even on the first cube, Prime on the second cube) = P(Even on the first cube) * P(Prime on the second cube)
    P(Even on the first cube, Prime on the second cube) = 1/2 * 1/2
    P(Even on the first cube, Prime on the second cube) = 1/4
     

Share This Page