20. Case study based - 4
Plan for Sitting Arrangement
There are two examination rooms A and B on top floor of school. Some students are sitting in room A and some are sitting in room B. Consider, number of students seating in room A are x and number of students seating in room B are y.
The teacher has various plan for their sitting arrangements.
pls. answer the MCQ attached
Answers
20. Case study based - 4
Plan for Sitting Arrangement
There are two examination rooms A and B on top floor of school. Some students are sitting in room A and some are sitting in room B. Consider, number of students seating in room A are x and number of students seating in room B are y.
There are two examination rooms A and B on top floor of school. Some students are sitting in room A and some are sitting in room B. Consider, number of students seating in room A are x and number of students seating in room B are y.The teacher has various plan for their sitting arrangements.
Answer: A is 100 & in room B is 80
Step-by-step explanation:
Let the no: of students in rooms A and B be x and y respectively.
Then, x−10=y+10
⇒x−y=20⟶(i)
and x+20=2(y−20)
⇒x−2y=−60⟶(ii)
Solving (i) and (ii) simultaneously,we get ,
x=100 & y=80
∴ The no: of students in room A is 100 & in room B is 80.
a.(ii) x+y=20
b.(iii)
c.(i)
d.(ii)
e.((iv)
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