I need help understanding the formula of finding the binomial probability experiment. In the formula I don't know how to get the nCx part of the formula.

n Learning S... Pearson Learning S... Pearson Account Pr... Mcc Student Sign-Ins -... PJ INFJ Relationships,... PJ INFJ Personality Pro... INFJ personality | 1... G Google MATH-1308-512 > Modules > UNIT 2 - Preparation for Unit Midterm Exam 2 > 6.2 The Binomial Probability Distribution 2198-MATH-1308-512-ELEM STATISTICAL ANALYSIS Michele Marraudino & | 11/16/19 6:24 PM Homework: 6.2 The Binomial Probability Distribution Save ents Score: 0 of 1 pt 11 of 20 (10 complete) HW Score: 50%, 10 of 20 pts 6.2.39 Question Help According to a study done by a university student, the probability a randomly selected individual will not cover his or her mouth when sneezing is 0.267. Suppose you sit on a bench in a mall and observe people's habits as they sneeze. (a) What is the probability that among 18 randomly observed individuals exactly 5 do not cover their mouth when sneezing? b) What is the probability that among 18 randomly observed individuals fewer than 6 do not cover their mouth when sneezing? (c) Would you be surprised if, after observing 18 individuals, fewer than half covered their mouth when sneezing? Why? (a) The probability that exactly 5 individuals do not cover their mouth is (Round to four decimal places as needed. es ries Enter your answer in the answer box and then click Check Answer. Check Answer Clear All