I think that the answer is A
I think starting from the top it would go as follows
9/36, 27/36, 32/36 , 4/36
b.) 9/36
c.) I really don't remember how to do the "order doesn't matter" thing anymore, so idk. my best idea is for you to look up the formulas for permutation and combinations. I know it has to do with that
If I’m analyzing the question correct, you would pay 912 in total
2400 divided by 10 is 240 and 240 x 3 = 720 so your answer would be 720 calories per day