BTGmoderatorDC wrote:What is the probability that it will rain tomorrow?
(1) The probability that it rains today is 40%.
(2) If it rains today, the probability that it will rain tomorrow will increase by 10%.
OA E
Source: Veritas Prep
Certainly, each statement alone is not sufficient.
We have to get the probability that it will rain tomorrow.
By the information: If it rains today, the probability that it will rain tomorrow will increase by 10%, we get that if it rains today, the probability that it will rain tomorrow will be 40% + 10% of 40% = 44%. However, we do not know if it does NOT rain today, what will be the impact on tomorrow's rain . Whether the chance of tomorrow's rain, in relation to the non-occuarnce of todays' rain, decreases or increases; and by what percent.
The correct answer:
E
Hope this helps!
-Jay
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