Ria is always curious in creating formulas, for solving mathematical problems, of her own by repeated trial and error method. One day she found a formula for finding the surface area of the hexagonal pyramid. What should be the correct formula for the surface area of the hexagonal pyramid?
There are a total of 16 chocolates - 4 each in the flavors of mango, banana, grape and orange. There are also 5 children. If each child is allowed to choose their own favorite flavor, what is the probability that all of them will get flavors of their choice?