A shipment of 11 microwave ovens contains 2 defective units. A restaurant buys 3 of these units. What is the probability of the restaurant buying at least non defective units?

The pyramid shown has a square base that is 24 centimeters on each side. the slant height is 16 centimeters. what is the lateral surface area?

2x minus y equals 6, x plus y equals negative 3

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.