Given two normally distributed populations with equal means and variances of s2 1 100 and s2

Given two normally distributed populations with equal means and variances of s2 1 ¼ 100 and s2 2 ¼ 80, what is the probability that samples of size n1 ¼ 25 and n2 ¼ 16 will yield a value of
x1
x2 greater than or equal to 8?