A group of 10 people plan to contribute equally to pay for a friend’s gift that costs G dollars. If n additional people want to contribute to pay for the gift, the required contribution per person will be reduced by how many dollars?
Solution
Correct Answer: Option A
People =10
Total cost=G dollar
Per person cost= G/10 dollar
If n additional people want to contribute to pay for the gift then Per person cost =G/(10+n)
Reduced = G/10- G/(10+n) = Gn/(100+10n)
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