Hi

Note: The probability of x successes in n trials is: 

P = nCx*  where p and q are the probabilities of success and failure respectively. 

In this case p(cured) =.91 and q = .09

nCx = 

5 dolphins treated  n = 5

P(exactly 4 cured) = 5C4(.91)^4(.09) = 5(.91)^4(.09)= .3086 

RELATED QUESTIONS

when treated with an antibiotic, 94% of all dolphins are cured of an ear infection. if 5... (answered by mykasha)

When treated with an antibiotic, 90% of all the dolphins are cured of an ear infection.... (answered by reviewermath)

When treated with antibiotics. 98% of dolphins are cured of an ear infection. if 5... (answered by stanbon)

When treated with an​ antibiotic, 98​% of all the dolphins are cured of an ear... (answered by Boreal)

use an Euler diagram to determine whether the syllogism is valid or invalid.

All... (answered by MathLover1)

          Biologists at the Long Beach aquarium would like to know if conditions at... (answered by stanbon)

Please kindly help me.  I am stuck with this question and cannot move on. Thank you again  (answered by stanbon)

Please help me. I need desperate help.

Biologists at the Long Beach aquarium would... (answered by stanbon)

I am unclear as to how to put this problem together:

To estimate the population of... (answered by stanbon)