The accuracy of weather forecast in one weather station is 80%, and only two of the five forecasts are accurate.

Of the five predictions, there are exactly two accurate probabilities: c (5 5,2) * 0.82 * 0.23 =10 * 0.1.5 * 29 = 0.0512.

Only two of the five predictions are accurate, and the probability that the third prediction is accurate:

(c(4, 1)*0.8*0.2^3)*0.8=4*0. 1^4*2^6*0.8=0.02048

These include:

C (4, 1) * 0.8 * 0.2 3 is 1, and there is a probability of 1 in 2, 4 and 5 predictions.