A new antibiotic is effective for 85% of infections. The antibiotic is given to 40 patients.

a) What is the probability that the antibiotic will work in less than half of the patients?

Question

A new antibiotic is effective for 85% of infections. The antibiotic is given to 40 patients.

a) What is the probability that the antibiotic will work in less than half of the patients?

anonymous · Answer

Half the patients is 20. So less than 20 is 19. Hence, here it describes $$P(X<20)=P(X≤19)$$

aihberkhan · Answer

@Mehek14 

Please Help!

aihberkhan · Answer

Umm, that is not my problem. 

a) What is the probability that the antibiotic will work in less than half of the patients?

That is my problem

@Victoriasushchik

victoriasushchik · Answer

ok sorrry!