Answer: 3.1 kg
Explanation:
Total amount sold of apples and pears = 6.6 kg
Of that 6.6 kg, 3.5 kg is the weight of the apples.
Subtract the weight of the apples from the total weight of the apples and pears.
6.6 kg (total weight) - 3.5 kg (weight of apples) = 3.1 kg (weight of pears)