At a conference of 250 people, 30% of the participants are french, 35% are americans, 20% are germans, and the rest are of the other nationalities. among any 3 participants, what is the probability that they are not all from other countries? a: 50 b: 75 c: 150 d: 175

According to the data set, where should the upper quartile line of the box plot be placed?

How do i simply this radical expression?

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?