Start Free Mock LoginAlready registered? Login here

Mathematics - Permutation & Combination Question with Solution | TestHub

MathematicsPermutation & CombinationFundamental PrincipleEasy2 minQB

MathematicsEasysingle choice

In a cross word puzzle, 40 words are to be guessed, of which 7 words have each an alternative solution. If $k$ is the number of solutions of the cross word puzzle then $130 - k$ is $____$

Options:

Answer:

Solution:

Each one of 7 words can be filled in 2 ways i.e $2^{7} = 128$ ways

Rest of 33 words can be filled in only one way.
∴ total ways $= 128$

Stream:JEESubject:MathematicsTopic:Permutation & CombinationSubtopic:Fundamental Principle

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...