Elitmus Exam Numerical Ability Permutation and Combination

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.


1;) 120
2:) 96
3:) 576
4:) 496

b:) Ram is a Math Teacher.he never teaches two successive classes in adjacent classrooms.how many distinct trip
to classroom are possible for ram if there are 9 classroom in the school.

1:) 72
2:) 324
3:) 30
4:) 180

Read Solution (Total 9)

Elitmus Other Question

Sajeed and Majeed are gambler.they love talking on final team ranking in cricket tournament.LPI cricket tournament is thier favorite.
A total of five team is participating in this year LPI(A,B,C,D,E).before the tournament begins,sajeed and majeed guess the result.
According to sajeed ranking will be A,B,C,D,E where according to majeed thier ranking will be D,A,E,C,B.At the end of tournament it turns out
that sajeed had not predicted even a single rank corectly nor he had predicted correct ordering of any pair of consecutive teams.on the other hand
majeed had predicted ranking of two teams correctly and he had also predicted ordering of two pairs of consecutive teams.


Answer the following quenstion

(a) :Which Team Won LPI tournament this year

1:) A
2:) B
3:) E
4:) None Of These

(b) :Which team was ranked one behind team B

1:)A
2:)C
3:)D
4:)None Of These

A B C
x D E
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F E C
D E C
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H G B C