The exchange rate between the pound and the euro is £1 = €1.25 - Edexcel - GCSE Business - Question 8 - 2015 - Paper 1

To determine the cost in euros of 425 units, we will use the exchange rate given: £1 = €1.25.

First, we need to convert the units into pounds. Assuming each unit costs £1:

$ext{Cost in pounds} = 425 ext{ units} imes £1/ ext{unit} = £425$

Next, we convert this to euros using the exchange rate:

$ext{Cost in euros} = £425 imes €1.25/£1 = €531.25$

Therefore, the correct answer is B €531.25.