the case VISO asks for an estimation of revenues for a client with an annual income of 30,000 EUR. It requires to assume how much a customer spends on average of his or her income via credit card and the case assumes 45%. How is this justified, especially because we are not given any hints from which countries the customers are from. The solution provides no further justification for this number.
Can anyone share ideas how to get this estimation without directly asking the interviewer for the number?
Many thanks and kind regards