Na certain store, there is a .03 probability that the scanned price in the bar code scanner will not match the advertised price. the cashier scans 780 items.
(a) what is the expected number of mismatches? (round your answer to the nearest whole number.)
(b) what is the standard deviation? (use your rounded number for the expected number of mismatches for the calculation of standard deviation. round your final answer to 4 decimal places.)

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%

1.) 18+5 is one way i’m pretty sure there are others but i can’t think of them right now