Elitmus Exam Numerical Ability Algebra

he Range of the function f(x) = (x - 2) / (2 - x) is
A) -1 to 1
B) 0 to 1
C) -1 to 0
D) None of above

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Elitmus Other Question

New public school have a circular layout. The school has teachers specializing in various subjects. All classroom of the school are equally spaced apart and located along its perimeter. Each Teacher needs four classes in day. There is strange rule.the first and last class has to be in the same class room. The other two classes have to be at two other distinct class rooms. Answer the following
a:) Bharti is a history teacher.in addition to above rule of the school she teaches exactly one pair of successive classes in adjacent classrooms.how many distinct trips to classes rooms are possible for Bharti if there are 12 classroom in school.
Chief minister Arnav , other ministers and policemen travel from one place to other in a convey. Each of them have their own cars. There are 10 members- 4 police and 6 ministers - The ministers are Arnav, M, Rakesh, G, S and B.
1)Arnav and G are scared and do not stand at the front or at the rear end of the convey
2) M is at the 9th position
3) S,B and Rakesh move one after the other and B is always between S and Rakesh.
4) Arnav and G are neither after nor before any minister.
What are combinations possible?

A) 5
B) 7
C) 3
D) none of these