Computer Sciences > GATE 2024 SET-2 > Permutation and Combination
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. The number of trials does each wizard make before coming to this conclusion?
A
24
B
48
C
16
D
12

Correct : a

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