Use the top-level ratio 3:4 to find how many apples and pears there are, then break each group down using sub-ratios.
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• Top-level ratio 3:4 means 7 units in total.
• 140 ÷ 7 = 20 per unit.
• Apples: 3 × 20 = 60
• Pears: 4 × 20 = 80
For the apples (sub-ratio 5 + 1):
• 6 parts = 10 per part
• sweet: 5 × 10 = 50
• sour: 1 × 10 = 10
For the pears (sub-ratio 3 + 1):
• 4 parts = 20 per part
• sweet: 3 × 20 = 60
• sour: 1 × 20 = 20
Total sweet: 50 + 60 = 110.
Check: 60 + 80 = 140 = total (140). ✓
Final Answer: 110