30% of all object X is infected with bacteria. A person has purchased 12 object X, what is the probability the consumer will have more than 6 contaminated object X?
Follow up question, suppose a company buys 1000 object X, find an approximate 95% interval for the number of infected object X.
How do u solve this problem?? I've tried using sample proportion, that didnt work for me...and i dont know stnd deviation so i cant do calculate p value either...
any help much appreciated!