Answer and Step-by-step explanation:
p= probability of straight stitching = 89.4% = 89.4/100= 0.894
n = the total sample of randomly selected baseballs
x = quantity of baseballs that have straight stitching = 5
x follows a binomial distribution
p(X=x) = nCx * p^x(1-p)^n-x
= 7C5 * 0.894⁵ * (1-0.894)⁷⁻⁵
= 21 * 0.571 * 0.011236
= 0.1347
= 13.47%
the probability is only 13.47% therefore the company has to stop the production line
