What kind of star is our sun classified as

Place me with this question is my last question

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).

Resistivity of a material is the resistance of a cm long sample of the material of 1 cm2 cross-sectional area.