A certain group of jewelers agreed to donate y dollars to Oxfam Charities for each engagement ring sold during a 30-day period. What was the total amount that was expected to be donated?
80 more rings were sold than expected, so the total amount donated was $2,000 more than the expected amount.
A total of 400 engagement rings were expected to be sold
DS - Eqn.
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- karthikpandian19
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- eagleeye
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Hi karthikpandian19:
Let there be n rings expected to be sold. Then total money expected to be donated =ny. So we need to find ny.
Let's look at the statements now:
1. 80 more rings were sold than expected, so the total amount donated was $2,000 more than the expected amount.
So we have (80+n)*y=ny+2000 => 80y = 2000 => y = 25. So we know y but still don't know what n is. Not sufficient.
2. In this case, we are told n=400, we don't know what y is. Not sufficient.
Both together: First one tells us y, second tells us n. So together, we get yn. Sufficient.
So C is the answer.
Let me know if this helps
Let there be n rings expected to be sold. Then total money expected to be donated =ny. So we need to find ny.
Let's look at the statements now:
1. 80 more rings were sold than expected, so the total amount donated was $2,000 more than the expected amount.
So we have (80+n)*y=ny+2000 => 80y = 2000 => y = 25. So we know y but still don't know what n is. Not sufficient.
2. In this case, we are told n=400, we don't know what y is. Not sufficient.
Both together: First one tells us y, second tells us n. So together, we get yn. Sufficient.
So C is the answer.
Let me know if this helps
- karthikpandian19
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- Posts: 1665
- Joined: Thu Nov 03, 2011 7:04 pm
- Thanked: 165 times
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OA is C
karthikpandian19 wrote:A certain group of jewelers agreed to donate y dollars to Oxfam Charities for each engagement ring sold during a 30-day period. What was the total amount that was expected to be donated?
80 more rings were sold than expected, so the total amount donated was $2,000 more than the expected amount.
A total of 400 engagement rings were expected to be sold
Regards,
Karthik
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Karthik
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