dbinom(0, size=10, prob=0.744) + dbinom(1, size=10, prob=0.744) + dbinom(2, size=10, prob=0.744) + dbinom(3, size=10, prob=0.744) + dbinom(4, size=10, prob=0.744) + dbinom(5, size=10, prob=0.744) + dbinom(6, size=10, prob=0.744) + dbinom(7, size=10, prob=0.744) # [1] 0.4923509 pbinom(7, size=10, prob=0.744) # [1] 0.4923509