EX = 200 * 0.7 = 140；
DX = 200 * 0.7 * 0.3 = 42
p {(X-EX)/sqrt(DX)& lt； = x} = f(x) (f(x) is a standard normal function)
If the yield meets the probability of at least 95%, then f(x)=0.95, from which the size of x can be calculated (look up the normal distribution table).
X is between 1.64 and 1.65.
X = T at this time (t is known at this time);
x- 140/sqrt(42)& lt； = T；
x = 140+T * sqrt(42)；
X = 15 1
The power consumption is151*15 = 2265.