Question

A die is rolled 6 times. Find the probability P(of exactly 4 occurrences of 2).
a.
0.39%
c.
0.47%
b.
2.6%
d.
0.8%

Answer 1

I think you can use the binomial theorem for probability \[\Large (nCr) p^r q^{n-r}\]
p is the probability of success (chance of getting a 2),
q is the probability of not getting a 2.
r is the number of two's you want to get (exactly four).
n is the total number of rolls.