Answer:

mark has 9 apple left

Step-by-step explanation:

you took 6 apples to him and ate 3 apples to the 6 apple you took earlier and then mark has 10 apples left then he eat 1 so their is 9 apples left to mark

YOU THIEF!

9 APPLES LEFT

EXPLANATION:

YOU TOOK 6 APPLES AND ATE 3 OF WHAT YOU TOOK.MARK ATE 1 APPLE,SO IF WE ADD WHAT YOU TOOK AND MARK EAT THAT WOULD BE 7 APPLES.SUBTRACT IT TO THE THE OF APPLES MARK HAS AND YOU WILL GET 9 APPLES.