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The ratio of spinsters to cats is 2 to 7. If there are 25 more cats th
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03 Feb 2021, 06:23
03 Feb 2021, 06:23
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The ratio of spinsters to cats is 2 to 7. If there are 25 more cats than spinsters, how many spinsters are there?
A. 10
B. 12
C. 15
D. 18
E. 27
Kudos for the right answer and explanation
A. 10
B. 12
C. 15
D. 18
E. 27
Kudos for the right answer and explanation
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Joined: 10 Apr 2015
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Re: The ratio of spinsters to cats is 2 to 7. If there are 25 more cats th
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03 Feb 2021, 07:21
03 Feb 2021, 07:21
Carcass wrote:
The ratio of spinsters to cats is 2 to 7. If there are 25 more cats than spinsters, how many spinsters are there?
A. 10
B. 12
C. 15
D. 18
E. 27
Kudos for the right answer and explanation
A. 10
B. 12
C. 15
D. 18
E. 27
Kudos for the right answer and explanation
A quick and easy option is to list equivalent ratios
GIVEN: The ratio of spinsters to cats is 2 to 7
So, it's possible that there are 2 spinsters and 7 cats [difference = 7 - 2 = 5.....we need a difference of 25]
It's also possible that there are 4 spinsters and 14 cats [difference = 14 - 4 = 10.....we need a difference of 25]
Or there are 6 spinsters and 21 cats [difference = 15.....we need a difference of 25]
Or there are 8 spinsters and 28 cats [difference = 20.....we need a difference of 25]
Or there are 10 spinsters and 35 cats [difference = 25.... BINGO!!!]
So, there are 10 spinsters
Answer: A
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Re: The ratio of spinsters to cats is 2 to 7. If there are 25 more cats th
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23 Apr 2023, 11:53
23 Apr 2023, 11:53
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Please let me know if this would work for other similar questions:
I set 7/5 = x/(x+25) and then I cross multiplied and got the equation 2x + 50 = 7x. After solving for x I got x=10.
Thank you
I set 7/5 = x/(x+25) and then I cross multiplied and got the equation 2x + 50 = 7x. After solving for x I got x=10.
Thank you
