knitr::include_graphics('7.png')

# (a)

# Let's find out the probability of no one having this blood type in a city of 10,000 people

exp(1)^(-10)*100
## [1] 0.004539993

Probability for no one having this blood type is 0.00453% in a city of 10,000 people

(b)

round(1000*log(2),0)
## [1] 693