Aprofessor of statistics noticed that the marks in his course are normally distributed. he has also noticed that his morning classes average 73%, with a standard deviation of 12% on their final exams. his afternoon classes average 77%, with a standard deviation of 10%.what is the probability that the mean mark of four randomly selected students from a morning class?

true

explanation:

it's both, now can you answer my most recent question?

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

answer: 5100 just subtract

step-by-step explanation: