Advanced Mathematics Primary 4 Data Analysis

The table shows a school's monthly book-fair income for 4 months: Jan = $1 280, Feb = $1 425, Mar = $1 660, Apr = ?. The school targets an average monthly income of $1 500 over the four months. To reach this target, the April income must be:

A $1 405
B $1 635
C $1 720
D $1 615
Show Worked Solution

Worked Solution

Step 1: Target total = average × count = 1 500 × 4 = $6 000. Step 2: Sum of first three months = 1 280 + 1 425 + 1 660 = $4 365. Step 3: April income = 6 000 − 4 365 = $1 635. Answer: $1 635

Correct answer: $1 635

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