An algebra problem by Montse Hernandez

Algebra Level pending

Se compran tres manzanas por $10 y se venden cinco manzanas por $20, ¿Cuántas manzanas se deben vender para ganar $150?

Moderators' edit: possible translation:

Three blocks purchased for $ 10 and five blocks sell for $ 20, how many apples will be sold to win $ 150?

125 300 100 225 150

Montse Hernandez by Montse Hernandez , 33, Mexico

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1 solution

  • We are buying 3 apples for 10$ : 10 3 \frac{10}{3} = 3.33$ for each apple
  • We are selling 5 apples for 20$ : 20 5 \frac{20}{5} = 4$ for each apples
  • We make a profit of .67c for each apple sold : 4 - 3.33 = 0.67

Number of apple sold to earn 150$ : 150 0.67 \frac{150}{0.67} = 223.88 but the real value of the profit is 0.66666666... so the real answer is 150 0.666666666 \frac{150}{0.666666666} = 225

Answer = 225

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