A medication is 69 effective against a bacterial infection F

A medication is 69% effective against a bacterial infection. Find the probability that if 9 people take the medication, at least 1 person\'s infection will not improve. Please round the final answer to 2 or 3 decimal places.

Solution

P(at least 1 not effective) = 1 - P(none not effective) = 1 - P(all effective)

= 1 - 0.69^9

= 0.964547912 [ANSWER]