Question

Celia bought a bag of 12 goldfish for $3. What is the cost of 1 goldfish?

Answer 1

we know that

Celia bought a bag of $12$ goldfish for $\ 3$

so

by proportion

Find the cost of $1$ goldfish

$\frac{3}{12} \frac{\ }{goldfish} =\frac{x}{1} \frac{\ }{goldfish} \\ \\x=3/12 \\ \\x=\ 0.25$

therefore

the answer is

The cost of one goldfish is $\ 0.25$

Answer 2

Celia will pay 0.25 dollars for 1 goldfish. The cost of 1 goldfish is $ 0.25

The Total number of goldfish purchased is 12.

Cost price for 12 goldfish is $ 3.

Let the price of 1 goldfish be x dollars.

Therefore,

$\begin{aligned}x \times\ 12&=\ 3\\x&=\dfrac{3}{12}\\x&=0.25\end{aligned}$

Hence, the cost of 1 goldfish is 0.25 dollars.

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