1000+ Aptitude Questions and Answers 2023 - 2024 - 1

Ans: C

Required number of ways = 5! = 5 x 4 x 3 x 2 x 1 = 120.

Ans: C

Required number of arrangements = $${6!} / {2!}$$ = $${6 × 5 × 4 × 3 × 2} / {2}$$ = 360.

Ans: C

There are three places to be filled up to form a 3 digit number. Since any digit may be repeated any number of times, each 1 of three places can be filled up by any of the given 4 digits in 4 ways.

Hence, the number of words that can be formed = 4³ = 64.

Ans: C

Required number of ways = 6! = 720.

Ans: B

The 1^st post can be filled up in 6 ways.

The 2^nd post can be filled up in 5 way.

And the 3^rd post can be filled up in 4 ways.

∴ By the principle of association, the 3 posts can be filled up in 6 x 5 x 4 = 120 ways.