The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated that 45% of adult Australian sheep dogs weigh 65 pounds or more. A sample of 12 adult dogs is studied.
What is the probability that more than 9 of them weigh 65 lb or more?
A) 0.0079
B) 0.9644
C) 0.0356
D) 0.0011

Question

Quizplus · Accepted Answer

The probability of a dog weighing 65 lb or more is 0.45. The probability of a dog weighing less than 65 lb is 0.55. The probability of more than 9 of the 12 dogs weighing 65 lb or more is 0.0079.

The Australian Sheep Dog Is a Breed Renowned for Its