Is eating a apple, tangerine and banana too much sugar for a single day?

One fruit. It depends on the preson and what else you are eating, so a detary consult is the best idea. However, in general one fruit is not too much sugar for a healthy inidividual. In fact five serving of fruits or vegetables per day is the usual recommendation for healthy eating. This includes not just sugar but fiber caloiers and vitamins and proteins.