Step-by-step explanation:
A+80+15=180
A+95=180
A=180-95
A=85
B+85=180
B=180-85
B=95
3/7= 0.42857143
rounded to the neared thousandth, it is 0.429
Since 120 students gained less than 70, and 70 is the upper quartile, 120 people are in the 75% of all the students so we need to find the total number of students.
we need to multiply 0.75 (75%) by something to get 120. which is 160 (the total number of all students).
and since 48 is the median score, find 50% of 160 which is 80!
hope this helps :)
63/12 = 4.2
4.2 x 12 = 50.4
x = 50.4
