prob. that less than 4 candies in box are red

The choco-latie candies company makes candy-coated chocolates, 40% of which are red. The production line mixes the candies randomly and packages ten per box. What is the probability that less than four candies in a given box are red?

What are your thoughts? What have you tried? How far have you gotten? Where are you stuck?

Please be complete. Thank you!

Eliz.