Question

Kim rolled a number cube four times.
What is the probability that she rolled a number less than 3 on all of her rolls?

Answer 1

a number less than 3 on a number cube (1, 2) = 2/6 = 1/3

4 times = 1/3 x 1/3 x 1/3 x 1/3 = 1/81

Answer : B

1/81

Answer 2

$|\Omega|=6^4=1296\\ |A|=2^4=16\\\\ P(A)=\dfrac{16}{1296}=\dfrac{1}{81}$