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Racing dog!

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by bhumika.k.shah » Sun Jan 31, 2010 3:35 am
A racing dog ran 40 races before retiring at age 4. How many races did he win?

(1) He won his first 30 races, all run before the age of 4.
(2) He lost 25 percent of his races before age 4, won none of his last 10 races, and won 75 percent of his races overall.

I wanna know the equation of the second statement.
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Source: — Data Sufficiency |
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by ajith » Sun Jan 31, 2010 3:55 am
bhumika.k.shah wrote:A racing dog ran 40 races before retiring at age 4. How many races did he win?

(1) He won his first 30 races, all run before the age of 4.
(2) He lost 25 percent of his races before age 4, won none of his last 10 races, and won 75 percent of his races overall.

I wanna know the equation of the second statement.
1) Not sufficient - Doesnt tell about the rest of the races

2) Sufficient he won 75% of his races = 30

Hence B
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by bhumika.k.shah » Sun Jan 31, 2010 10:39 am
i wanna know the equation of the second statement . how did u derive 30 ?
ajith wrote:
bhumika.k.shah wrote:A racing dog ran 40 races before retiring at age 4. How many races did he win?

(1) He won his first 30 races, all run before the age of 4.
(2) He lost 25 percent of his races before age 4, won none of his last 10 races, and won 75 percent of his races overall.

I wanna know the equation of the second statement.
1) Not sufficient - Doesnt tell about the rest of the races

2) Sufficient he won 75% of his races = 30

Hence B
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by bhumika.k.shah » Sun Jan 31, 2010 10:40 am
OA B
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by sars72 » Sun Jan 31, 2010 12:11 pm
bhumika.k.shah wrote:i wanna know the equation of the second statement . how did u derive 30 ?
ajith wrote:
bhumika.k.shah wrote:A racing dog ran 40 races before retiring at age 4. How many races did he win?

(1) He won his first 30 races, all run before the age of 4.
(2) He lost 25 percent of his races before age 4, won none of his last 10 races, and won 75 percent of his races overall.

I wanna know the equation of the second statement.
1) Not sufficient - Doesnt tell about the rest of the races

2) Sufficient he won 75% of his races = 30

Hence B
75% = 3/4 -> 3/4 * 40 = 30
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