Question

If the number of watches sold by stores A, D and E increased by 10%, 35% and 15% respectively and so did the sports watches sold by these stores from 2004 to 2005, what was the total number of luxury watches sold by these three stores in 2005?

• A. 16172
• B. 14966
• C. 15848
• D. 15964
• E. 16392

Answer 1

The correct option is D 15964

Total number of luxury watches sold by A, D and E together
$=(\frac{18\times 560\times 110}{100}-\frac{16\times 320\times 110}{100})+(\frac{15\times 560\times 135}{100}-\frac{13\times 320\times 135}{100})+(\frac{20\times 560\times 115}{100}-\frac{22\times 320\times 115}{100})=(11088-5632)+(11340-5616)+(12880-8096)=546+5724+4784=15964$