Ms. Grady has 250 shirts in her closet. Of these shirts, 25% are pink, 15% are white, 20% are blue, and the rest are are black. How many black shirts does Ms. Grady have in her closet?

Amayoral candidate would like to know her residents’ views on a public open space before the mayoral debates. she asks only the people in her office. her co-workers are an example of a census population convenience sample simple random sample