2002 AMC 8 Problems/Problem 25

Revision as of 18:46, 14 July 2020 by Sakshamsethi (talk | contribs) (Solution 2 (easiest))

Problem

Loki, Moe, Nick and Ott are good friends. Ott had no money, but the others did. Moe gave Ott one-fifth of his money, Loki gave Ott one-fourth of his money and Nick gave Ott one-third of his money. Each gave Ott the same amount of money. What fractional part of the group's money does Ott now have?

$\text{(A)}\ \frac{1}{10}\qquad\text{(B)}\ \frac{1}{4}\qquad\text{(C)}\ \frac{1}{3}\qquad\text{(D)}\ \frac{2}{5}\qquad\text{(E)}\ \frac{1}{2}$

Solution

Since Ott gets equal amounts of money from each friend, we can say that he gets $x$ dollars from each friend. This means that Moe has $5x$ dollars, Loki has $4x$ dollars, and Nick has $3x$ dollars. The total amount is $12x$ dollars, and since Ott gets $3x$ dollars total, $\frac{3x}{12x}= \frac{3}{12} = \boxed{\text{(B)}\ \frac14}$. $\blacksquare$


Solution 2 (easiest)

Assume Moe has $$ 5$. Using the information given in the problem, we can conclude that Loki has $$ 4$ and Nick has $$ 3$. After everyone gives Ott some fraction of their money, he gets $$ 1$ $+$ $$ 1$ $+$ $$ 1$ $=$ $$ 3$. reviewing the situation, Moe now has $$ 5$ $-$ $$ 1$ $=$ $$ 4$, Loki has $$ 4$ $-$ $$ 1$ $=$ $$ 3$, and Nick has $$ 3$ $-$ $$ 1$ $=$ $$ 2$. Ott has $\frac{3}{4+3+2+3}$ fraction of the group's money. Thus, the answer is $\frac{3}{12}=\boxed{\text{(B)}\ \frac14}$.

~sakshamsethi

Video Solution

https://youtu.be/ysNxyATCxzg - Happytwin

See Also

2002 AMC 8 (ProblemsAnswer KeyResources)
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