I have just started probablity and I am trying to understand these question.
A study has found that 60% of all companies say that the cost of health care is too high. If we choose 8 companies at random, find the probability that the given number of businesses say the cost of health care is too high.
a) All 8 companies
This is my working.
$8\choose8$ x 0.6 = 0.6 = 60%
b) at most 2 companies
I am not sure how to do this.
I am a beginner to probablity so forgive me if this suppose to be obvious.