Abox contains 13 transistors, 3 of which are defective. if 3 are selected at random, find the probability that

a. all are defective
b. none are defective

Margaret is purchasing a house for $210,000 with a 15 year fixed rate mortgage at 4.75% interest she has made a 5% down payment the house is valued at 205,000 and the local tax rate is 3.5% homeowners insurance 600 per year what are her total monthly payment