About 10% of people in the United States do not wear a seat belt. Suppose we take a random sample of 180 U. S. residents, and let X - the number of people who do not wear their seat belt.
(a) Calculate the mean and standard deviation of the sampling distribution of X. Be sure to show the formulas that you used in your
calculations.
(b) Interpret the standard deviation.
c) Justify that the distribution of X is approximately normal.

The answer is 270 cars.you can do this by making a proportional relationship. for instance, 200 is the whole we are using, so on a “number line” 200 would be over 100%. now, since he sells 35% more, add 35% to 100% to get 135% on the other side of the “number line” on the bottom half, leaving the top half empty.cross multiply 200 by 135 then divide by 100 to get your answer. i hope this , if it did, , if you don’t mind, giving me brainiest! 200/100% } 200 • 135 /100 ? /135%

12+3b -1=-5-b -12-1+5=-b-3b -8=-4b