Mifune has increased the training for the junior high and high school students.  To sweeten the deal, he has offered both groups a valuable prize, and it’s going to be big.
Probability of returning three 
balls without falling over...
La probabilidad de darle 
a tres pelotas sin caer,
La probabilidad de devolver tres pelotas sin caerme
Probabilidade de devolver
 três bolas sem errar...