Assume 70% of the adult population are vaccinated for a particular virus.

a)Amongst 7 randomly selected adults, what is the probability that:

i) no-one is vaccinated?

ii) exactly 3 people are vaccinated?

iii) no more than 5 people have been vaccinated?

b)For 300 randomly selected adults,

i) how many would you expect to be vaccinated?

ii)what is the probability that less than 190 people have been vaccinated?