Hi,
The answer is C) but could not figure out why. Can anyone explain pls?
ps 500 test23 # 12
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This one is fairly simple if you use the unitary method logic....
n books ------ $50
1 book ------- 50/n
Thus n-1 books ------ 50 *(n-1)/n
n books ------ $50
1 book ------- 50/n
Thus n-1 books ------ 50 *(n-1)/n