Question

A man purchased some eggs at 3 for $ 5 and sold them at 5 for $ 12 Thus, he gained $ 143 in all. How many eggs did he purchase? ​

Answer 1

Answer:

Let he buy 15 eggs.          [∴ LCM of 5 & 3 = 15 ]

⇒ CP of 3 eggs = $ 5

∴ CP of 15 eggs = $ 25

⇒ SP of 5 eggs = $ 12

∴ SP of 15 eggs = $ 36

∴ Gain = SP of 15 eggs - CP of 15 eggs = 36 – 25 = $ 11

∵ $ 11 = 15 eggs

$ 143 = $\frac{15}{11}$ × 143 = 195 eggs.

He purchased 195 eggs