X : the gas used by first car in 1 particular week
y : the gas used by second car in 1 particular week

The proportion would be the number of the sample (x) over the population size (n)
Here we have x = 59,969 and n= 461,299
P = x/n = 59969/461299
P = 0.13
I think it's true because its the same data set just put in order backwards.
Hope this helps!! :-)
So ten tens = 100 so u multiply and u get 40 tens which are 400= 4 hundreds
985-35=950, 950÷2=475, 475+35=510, 510 and 475