Question 1208492
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The other tutor supplied a response showing a typical formal algebraic solution -- which is probably what you were looking for.<br>
But solving problems like this informally (and mentally), using logical reasoning and simple arithmetic, is good brain exercise.<br>
For this particular kind of problem, the method shown below is useful.<br>
If all 7 pounds were regular chocolates, the total cost would be 7($4) = $28.
But the actual cost is $31, which is $3 more.
Each pound of premium chocolates costs $1 more than each pound of regular chocolates, so the number of pounds of premium chocolates is $3/$1 = 3.<br>
ANSWER: 3<br>