In a sample of 80 adults, 25 said that they would buy a car from a friend. three adults are selected at random without replacement. find the probability that none of the three would buy a car from a friend.

31.9%

Step-by-step explanation:

We have that,

Total number of adults = 80

Number of people that would buy a car from a friend = 25

So, the number of people that would not buy a car from a friend = 80-25 = 55.

Since, three people are selected randomly.

Thus, the probability that none of them would buy a car from a friend is given by,

i.e.

i.e.

i.e.

i.e.

i.e. 0.319

Thus, the probability of people who would not buy a car from a friend is 0.319 i.e. 31.9%

omg what happend to your question? if you could edit this question i can

step-by-step explanation:

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.