Two students are calculating the average weight of a gas, containing N2 and other gases. Student-1 takes the actual molecular weight of N2(28) and student-2 takes it wrong N2(14). The calculated molecular weights by both of them are 36.8 and 31.2 respectively.What is the percentage of N2 in the mixture?

Two students are calculating the average weight of a gas, containing N

1.	Two students are calculating the average weight of a gas, containing N2 and other gases. Student-1 takes the actual molecular weight of N2(28) and student-2 takes it wrong N2(14). The calculated molecular weights by both of them are 36.8 and 31.2 respectively. What is the percentage of N2 in the mixture?
A.	5%
B.	10%
C.	15%
D.	20%
Answer» C. 15%