Accuracy of weather forecast of weather station

(4/5)*(4/5)*(4/5)*( 1/5)*( 1/5)* C(5，2)= 128/725

Explain that the first accurate probability is 4/5, the second and third accurate probability is 4/5, the fourth and fifth inaccurate probability is 1/5, and then the third accurate and second inaccurate arrangement number is c (5,2) or c (5,3), so multiply this number.