On a ranch, a rancher can place a loop of rope, called a lasso, once in every 2 throws around a cow’s neck. What is the probability that the rancher will be able to place a lasso around a cow’s neck at least once in 3 attempts? Choose the correct choice from the following:
A) 3/4
B) 5/8
C) 7/8
D) 9/16
E) 15/16
P(missing all 3)=(1/2)^3=1/8   P(success on at least one attempt)=1-1/8=7/8   The answer is 7/8.
<result>C</result>
On a ranch, a rancher can place a loop of rope, called a lasso, once in every 2 throws around a cow’s neck. What is the probability that the rancher will be able to place a lasso around a cow’s neck at least once in 3 attempts?