$11.2\text{L}$ of $C{H}_4$ and $22.4\text{L}$ of $C_2{H}_6$ at $STP$ are mixed. Then the correct statement(s) is/are:

Q. Noora claims that her weight is greater than 55 Kg but less than 62 Kg. Her friend, Sona, does not agree with her and says that Noora’s weight is greater than 50 Kg, but less than 60 Kg. However, her mother’s view is that her weight cannot be greater than 58 Kg. If all 3 of them are correct, what could be the average of all the possible integral values of the weight of Noora?

Q.

In Vignesh's opinion, his weight is greater than 65 kg but less than 77 kg. His brother does not agree with Vignesh and he thinks that Vignesh's weight is greater than 63 kg but less than 72 kg. His mother's view is that his weight cannot be greater than 68 kg. If all are them are correct in their estimation, what is the average of different probable weights of Vignesh?

Q. In Arun's opinion, his weight is greater than $6.5kg$ but less than $72kg$$.HisbrotherdoestnotagreewithArunandhethinksArun{s}^{\prime }weightisgreaterthan$60\ kg$butlessthan$70\ kg$.Hismothe{r}^{\prime }sviewisthathisweightcannotbegreaterthan$68\ kg$. If all are them are correct in their estimation, what is the average of different probable weights of Arun?

Q. The mass average molecular weight and number average molecular weight of a polymer are respectively 40000 and 30000. The poly-dispersity index of the polymer will be