4,5,5,5,6 When you add 4+5+5+5+6 it = 25. You then divide it by the amount f numbers which is 5, which = 5. And 5 is the number you see the most. So that is your answer
$315, i cant give a thorough explanation since i did it all in my head but basically amal gets 5 portions of the money and Salma gets 9, meaning she gets 4 more, so if 4 portions is $252 then it cant be any of the others since they are too low or way too high, $315 is the only reasonable one.
The chemist needs 381.6 milliliters for their experiment.
Any problem? u can talk:)
A is the answer if im wrong sorry