It is known that 40% of the adults support the idea of constructing a second International Airport for the country .A sample of 15 adults was questioned regarding this issue .
what is the probability of that no more that 6 in the sample support the idea ?
The Attempt at a Solution
I just want to know is this a binomial distribution where
if so the answer should be
SIGMA( r goes 0 to 6 )15Cr * 0.4^(r) * 0.6^(r)
am i correct ??/if I'm wrong please help me out !!!!!!Or if I'm' write confirm it thanks a lot!!!!!!!!!