the average of 50 numbers id 20 . if two numbers , namely 45 and 55 are discarded , the average of the remaining numbers is :
n0 = 50.0
n1 = 20.0
n2 = 45.0
n3 = 55.0
t0 = n2 + n3
t1 = n0 * n1
t2 = n0 - 2.0
t3 = t1 - t0
answer = t3 / t2
print(answer)