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:
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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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