Dear Aspirant,yes class 10th marks are counted in KVPY. The total aggregate should be 75% (maths science) for general category whereas 65% for the reserved category. If you are giving in class 11th, you fall in SA category otherwise there are 2 more categories 12th-SX, Bsc-SB.

So the total percentage is not taken into account rather maths and science aggregate are considered for registration rest the marks you attain in aptitude and interview results in KVPY will decide your rank.

Hope this was helpful.