Question 284723
A rock and a half rock weigh a pound and a half. The rock and the half rock weigh the same. How much would half the whole rock and the whole of the half rock weigh? 
a 2 1/2 b 1 1/8 c 1 7/2 d 2 1/4 e None of these.
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The rock and 1/2 rock weigh 3/4 pounds each.
Adding 1/2 a rock increased the total by 3/8 pounds
1.5 + 3/8 = 1 7/8 pounds
None of those, unless there's a typo in C