Discussion
After being marked down 20 percent, a calculator sells for $10. The original selling price was
*This question is included in Nova Math - Problem Set M: Elimination Strategies, question #3
| (A) | $20 |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 09/19/2012 08:56
That is the answer 12, so how can the answer be 12.5?
Posted: 09/19/2012 17:47
Hi Thad,
Original Price = P. Discounted Price = DP = $10. Discount = 20%
DP = P - P*20%
DP = P * (1-20*) = 80% * P = 10
P = 10 div by 80% = 10 * 100 / 80 = not 12, but the answer is ...
Original Price = P. Discounted Price = DP = $10. Discount = 20%
DP = P - P*20%
DP = P * (1-20*) = 80% * P = 10
P = 10 div by 80% = 10 * 100 / 80 = not 12, but the answer is ...