Question

19) A six-sided die is rolled six times. What is

the probability that the die will show an
even number at least two times?
A) 89.063% B) 93.75%
C) 85.547% D) 22.656%

Answer 1

D

Explanation:

Probability that the die will show an even number

in one rolling is 3/6=0,5 = p

We have formula for repeating rolling

n!/(r!(n-r)!) p^r (1-p)^(n-r)

n = how many times we repeat rolling = 6

r = how many times we want something to happen

(show an even number exactly two times) = 2

15 *(0,5)^2 *(0,5)^4 = 0,234375