I don't understand this question that well, can you please help me.

Students taking a make-up test receive the following grades: 76, 90, 97, 96, 86, 95, 94, 69, 71, and 75. Which grade has a percentile rank of 80?

The test score with a percentile rank of 80 is _.

So a percentile rank of a score is how the score of a individual test taker compares to the scores of the other test takers.

To find percentile rank you need to use this formula:  R = P/100 x (N + 1)

The first step is to compute the rank (R) of the 25th percentile. This is done using the following formula: R = P/100 x (N + 1) where P is the desired percentile (25 in this case) and N is the number of numbers (8 in this case).

I hope this helps a bit. Good luck with the problem!

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.