Suppose that four microchips in a production run of fifty are defective. A sample of six is to be selected to be checked for defects. (a) How many different samples can be chosen? (b) How many samples will contain at least one defective chip? (c) What is the probability (as a percent) that a randomly chosen sample of six contains at least one defective chip? (Round your answer to one decimal place.) %

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great