Skip to content
Official PYQ · 2024

GATE CS 2024 Set 2 Q2 — General Aptitude

Explain with AI

​​Two wizards try to create a spell using all the four elements, water, air, fire, and earth. For this, they decide to mix all these elements in all possible orders. They also decide to work independently. After trying all possible combination of elements, they conclude that the spell does not work.


How many attempts does each wizard make before coming to this conclusion, independently?

Choose one option
View worked solution

Answer: A

To find the number of attempts made by each wizard independently, we need to calculate the number of possible orders in which the four elements can be mixed.

The four distinct elements are:

  1. Water
  2. Air
  3. Fire
  4. Earth

Since all four elements must be used in each attempt, and the order of mixing matters (i.e., "all possible orders"), this is a permutation problem of arranging 44 distinct items.

The number of possible permutations of 44 distinct elements is given by:

Number of attempts=4!=4×3×2×1=24\text{Number of attempts} = 4! = 4 \times 3 \times 2 \times 1 = 24

Since each wizard works independently and tries all possible combinations, each wizard makes exactly 2424 attempts.

Therefore, the correct option is A.

Free practice · Your answers on this page are not saved.

Published
Report a correction
Keep exploringMore General Aptitude questions