R function: dbinom

dbinom(1, size=1, prob=0.85)
# [1] 0.85

dbinom(0, size=1, prob=0.85)
# [1] 0.15

dbinom (0, size=2, prob=0.5)
# [1] 0.25

dbinom (1, size=2, prob=0.5)
# [1] 0.5

dbinom (2, size=2, prob=0.5)
# [1] 0.25