A club has 50 members of which 20 are freshman, 15 are sophomores, 10 are juniors and 5 are seniors. How many ways are there to select a president, a vice president, and a secretary if they cannot be from the same class?

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?

Standard deviation of 19,29,21,22,23

Mr. thompson is on a diet. he currently weighs 260 pounds. he loses 4 pounds per month. what part of the story makes the relationship not proportional?