Asked by Asare
In a class of 60students,the number of student passed Biology is 6 more than the number of student passed Chemistry,8 student passed both subject.How many student passed Biology,how many student passed Chemistry,how many student passed only one subject?
Answers
Answered by
Reiny
number that passed chemistry --- c
number that passed biology ------ b
sketch a Venn diagram, label the circles C and B
place 8 in the intersection of the two circles
place b-8 and c-8 in the parts of the circle not overlapping.
so b-8 + 8 + c-8 = 60
b+c = 68
but it said: b = c+8
c+8 + c = 68
2c = 60
c = 30 , then b = 38
30 passed chemistry
38 passed biology
22 passed only chemistry
30 passed only biology
number that passed biology ------ b
sketch a Venn diagram, label the circles C and B
place 8 in the intersection of the two circles
place b-8 and c-8 in the parts of the circle not overlapping.
so b-8 + 8 + c-8 = 60
b+c = 68
but it said: b = c+8
c+8 + c = 68
2c = 60
c = 30 , then b = 38
30 passed chemistry
38 passed biology
22 passed only chemistry
30 passed only biology
Answered by
Edith
Please explain it further
Answered by
Anonymous
How many students passed only one subject
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