Hi , 

So in the year 2018- 19 , there are 17- 20% seats reserved for female candidates across the 31 NITs in the country . Admission would depend on various factors like number of girls seeking admission there , their range of marks etc . Considering all this , it would be difficult to assume that each year girls upto a particular rank are selected,  because it varies throughout the years .

In 2016 , almost 2400 girls were seeking admission in various NITs and so this year the number will only increase.  So with a rank of 64638 , admission into an NIT is difficult but not impossible.  In NIT Agartala closing rank of electronics and communication engineering was 137508 . Hence you have a small chance of getting admission . 

For detailed information check this link.  

https://engineering.careers360.com/news/after-iits-14-seats-for-women-in-nits-iiest-too-359011

Hope this was helpful. 

For further queries please approach careers360.