First, it "trials", not "trails"! P(x= m)= _{8}C_{m}(0.3)^{m}(0.7)^{8-m}. Since "x> 2" means x= 3, 4, 5, 6, 7, or 8, it might be simpler to find find P(x<= 2)= P(x= 0)+ P(x=1)+ P(x= 2) and then subtract from 1.nachelle said:Suppose x is a discrete, binomial random variable
Calculate P(x > 2), given trails n = 8, success probability p = 0.3
and
given trails n = 6, success probability p = 0.1