Use the top-level ratio 4:7 to find how many croissants and baguettes there are, then break each group down using sub-ratios.
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• Top-level ratio 4:7 means 11 units in total.
• 88 ÷ 11 = 8 per unit.
• Croissants: 4 × 8 = 32
• Baguettes: 7 × 8 = 56
For the croissants (sub-ratio 3 + 5):
• 8 parts = 4 per part
• chocolate: 3 × 4 = 12
• plain: 5 × 4 = 20
For the baguettes (sub-ratio 2 + 5):
• 7 parts = 8 per part
• seeded: 2 × 8 = 16
• plain: 5 × 8 = 40
Total plain: 20 + 40 = 60.
Check: 32 + 56 = 88 = total (88). ✓
Final Answer: 60