Question

the four transactions above were on marcos bank account. what was the average transaction? a $32.51 b $5.44 c $16.81 d $3.29

Explanation:

Step1: Calculate the sum of transactions

$$\begin{align*} &- 54.13+32.18 + 39.42-4.30\\ =&(-54.13 - 4.30)+(32.18 + 39.42)\\ =&-58.43 + 71.6\\ =&13.17 \end{align*}$$

Step2: Calculate the average

The average of \(n = 4\) numbers is \(\frac{\text{Sum}}{n}\). So the average is \(\frac{13.17}{4}=3.2925\approx3.29\)

Answer:

D. $3.29$