Statistics, probability, basketball foul shots

[Calculator14]

Homework Statement

Records show that 72% of basketball foul shots attempted are successfully made during practice. Today, each of the 10 members of the team gets a practice shot. What is the probability that at least 8 team members make the shot successfully?

Homework Equations

(answer posted below)

The Attempt at a Solution

(8/10 * .72) + (9/10 * .72) + (10/10 * .72) = 1.944

 

[rock.freak667]

Try using the binomial distribution.

 

[edgepflow]

Consider the rule for figuring 'AND' probabilities.

For example, what is the probability that two coin flips in a row will both be tails?

0.5 X 0.5 = 0.25 = 25%.

So there is also a 25% chance both will be tails.

Since all the probabilities must add to 100%, the chance of one flip being heads and the other tails is 50%.