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In a gaseous mixture, if alkane (C(x)H(2...

In a gaseous mixture, if alkane `(C_(x)H_(2x +2))` and alkene `(C_(y)H_(2y))` are taken in `2 : 1` mole ratio, the average molecular weight of mixture is observed to be 20. If the same alkane and alkene are taken in `1 : 2` mole ratio, the average molecular weight of mixture of mixture is observed to be 24. Then, the value of 'x' and 'y' and respectively :

A

2,1

B

1,2

C

2,3

D

3,2

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