During operations within controlled airspace at altitudes of more than 1,200 feet agl, but less than 10,000 feet msl, the minimum distance above clouds requirement for vfr flight is

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).