Find the unite rate

there are 12 boxes with 108 items
how many items per box?
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Emma will roll two number cubes labeled 1 through 6. she will record the sum of the two numbers after each roll. she will roll the two cubes 540 times. how many times should emma expect the sum to equal 5?

Guys i really need or i have to stay late up night

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?