Homework SourseA survey indicated that 10 of residents of a country have a
A survey indicated that 10% of residents of a country have a great deal of confidence in banks. If 14 residents of the country were chosen at random, find the probability that at least 3 had a great deal of confidence in banks.
Round to four decimal places as needed.
A survey indicated that 10% of residents of a country have a great deal of confidence in banks. If 14 residents of the country were chosen at random, find the probability that at least 3 had a great deal of confidence in banks.
Round to four decimal places as needed.
Round to four decimal places as needed.
Solution
we will apply here binomial distribution method
p =0.1 and q= 0.9
P (x) = ncr (p)^x * (q)^n-x
P(3) = 14c3 (0.1)^3 *(0.9)^11
=(364)*(0.001)(0.31381)
=0.114 answer
