Question

The record of a weather station shows that out of the past 250 consecutive days, its weather forecast were correct 175 times. What is the probability that on a given days, it was not correct?​

Answer 1

Total no of days=250

No of days it was correct=175

no of days it was not correct=250-175 =75

Therefore probability of it being wrong=75/250

=0.3

hope it is helpful^_^^_^

Answer 2

Answer:

Total number of days for which the weather forecast was made = 250

Number of days for which the forecast was correct = 175

Number of days for which the forecast was not correct = 250 - 175 = 75

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Therefore,

(i) Probability that the forecast was correct on a given day :

$\leadsto$$\sf\frac{Number\:of\:days\:for\:which\:the\:forecast\:was\:correct}{Number\:of\:days\:for\:which\:the\:forecast\:was\:made}$

$\leadsto$$\sf\qquad\cancel\dfrac{175}{250}$ = 0.7

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(ii) Probability that the forecast was not correct on a given day

$\leadsto$$\sf\frac{Number\:of\:days\:for\:which\:the\:forecast\:was\:not\:correct}{Number\:of\:days\:for\:which\:the\:forecast\:was\:made}$

$\leadsto$$\sf\qquad\cancel\dfrac{75}{250}$ = 0.3