A mass production line manufactures products of which 10% are faulty. A quality assurance (QA) expert samples products from the production line until he finds a defective product. a. What is the variable under study? (1.5) b. What is the probability that the QA expert sampled at least two products until he got the first defective product? (3) c. Find out the average number of sampled products to get the first defective product. (1.5) d. Also find out the standard deviation of the sampled products to get the first defective product. (1.5)

175

step-by-step explanation:

2 inches x 10 miles = 200 miles - 3 inches = 175

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

what level of math? also i don't need to be paid if i can you.

answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees