There are 20 students in a drama class. The mean age of 12 students is 18 years. The mean age of the remaining 8 students of the
drama class is 23 years. What is the mean age of all the students in the drama class?
1 answer:
Answer:
Step-by-step explanation:
Total sum of age of 12 students = 12*18 = 216;
Total sum of age of 8 students = 8*23 = 184;
Total sum of age of 20 students = 216+184 = 400;
Mean age of all the students = total age / number of students;
= 400/20 = 20 year
Step-by-step explanation:
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Answer:
16x- 20y=20
Step-by-step explanation:
20y-20y =0
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1/2 is the simpliest form,divide everything by 2
A=8ft^2
A=l•w
8=l•w
l=8/w
P=2(l+w)
12=2(8/w+w)
12=2(8/w+w/1)
12=2(8/w+w^2/w)
12=16w^2/w
12=16w
w=12/16
w=3/4=0.75ft
l=8/0.75=10.67ft
