Please solve.

For a grocery store in College Station, it is true that 72% of its ALL customers are from outside the city limits of Bryan College Station. Jim randomly selects 30 customers of that grocery store. What is the probability that Jim's sample proportion of customers outside the city limits of Bryan-College Station is less than 18%? (\"l 0.9936 A I cannot calculate this probability because np 15 (\"l I cannot calculate this probability because n(1 p)