R function: pbinom

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