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Recent questions tagged permutationsandcombinations
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GATE2019 EC: GA4
Five different books $(P, Q, R, S, T)$ are to be arranged on a shelf. The books $R$ and $S$ are to be arranged first and second, respectively from the right side of the shelf. The number of different orders in which $P, Q$ and $T$ may be arranged is ______. $2$ $6$ $12$ $120$
asked
Feb 12
in
Numerical Ability
by
Arjun
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1.4k
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gate2019ec
generalaptitude
numericalability
permutationsandcombinations
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GATE2017 EC2: GA9
The number of $3$digit numbers such that the digit $1$ is never to the immediate right of $2$ is $781$ $791$ $881$ $891$
asked
Nov 23, 2017
in
Numerical Ability
by
admin
(
2.7k
points)
gate2017ec2
generalaptitude
numericalability
permutationsandcombinations
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