Mr. dennis gave his class a 202020-question multiple choice quiz. the distribution of raw scores had a mean of 151515 and a standard deviation of 2.52.52, point, 5. mr. dennis is going to multiply each raw score by 555 so the quiz is worth a total of 100100100 points. if each score is multiplied by 555, what will be the mean and standard deviation of the distribution of new scores

75,62.5

Step-by-step explanation:

Given that Mr. Dennis gave his class a 20-question multiple choice quiz. The distribution of raw scores had a mean of 15 and a standard deviation of 2.5

If X is the correct questions in the 20 mcq then

X is  with mean = 15 and std dev = 2.5

when score is multiplied by 5

random variable now is

Y = 5x

E(Y) = Mean of Y =

Thus new score out of 100 would have mean = 75 and std deviation = 62.5

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.

the multiples of 15 are 15, 30,45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195,   210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375,   390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, and 735.

the factors of 15 are 1, 3, 5, and 15.

hope that , fam!

-une, your fren : )