Jambmaths question:
A trader bought goats for N4,000 each. He sold them for N180,000at a loss of 25%. How many goats did he buy?
Option A:
60
Option B:
50
Option C:
15
Option D:
36
Jamb Maths Solution:
$\begin{align} & \text{Let the cost price for all the }x\text{ goats be }N4,000x \\ & \text{Selling price of all the goats }=N180,000 \\ & \text{Loss}=\text{Cost Price}-\text{Selling Price } \\ & \text{Loss}=N4000x-N180000 \\ & percentage\text{ }loss=25% \\ & \frac{loss}{cost price}\times 100percent=25percent \\ & \frac{4000x-180000}{4000x}=0.25 \\ & 4000x-180000=1000 \\ & 3000x=180000 \\ & x=\frac{180,000}{3000} \\ & x=60 \\ & \text{The number of goats he brought are 60} \\\end{align}$
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