Average (mean) = (sum of all the data) / (# of data)
sum of all the data = (average)(# of data)
Thus for 100 students with an average of 93,
sum of all data = (93)(100) = 9300
and for 300 students with an average of 75,
sum of all data = (75)(300) = 22500
Therefore you would expect the overall average to be
(9300 + 22500) / (100 + 300) = 79.5 %
Now if there are x # of advanced students and y # of regular students, then
x + y = 90 (total # of students) and 93x + 75y = 87(x + y) (overall average)
The second equation can be simplified to x - 2y = 0
Subtracting the two equations yields
x = 60 and y = 90
Therefore you would need 60 advanced and 30 regular students.
Answer:
3,600
Step-by-step explanation:
1 yard= 36 inches
36 inches*100= 3,600
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Brainliest? I am trying to get to a new rank so I can help more people and I would totally appreciate it if you did!
Merry Christmas!
Answer:
the first one
Step-by-step explanation:
8 one thousand block is 8000
0 hundreds 000
4 tens. 40
6 ones. 6
8046
False, an inscribed angle is not formed by radii.
