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A gaseous mixture is composed of equal number of moles of $\mathrm{CH}_{4}, \mathrm{C}_{2} \mathrm{H}_{5}$ and $\mathrm{C}_{2} \mathrm{H}_{2}$. The average molecular mass of mixture (in amu) is :

(A) 36

(B) 48

(C) 24

(D) 60

The average molecular mass of mixture (in amu) will be 24.

Therefore, The correct option of this question is (C)

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