扎扎貌似比扎扎爸更懂概率

今天晚饭后，我跟扎扎妈说自己的Probability（概率）真差，需要补习补习。
扎扎在一旁听着，冷不丁插了一嘴：We are learning probability now in school. I am good at it.
吓扎扎爸一跳，扎扎开始考我概率问题：There are 7 apples in the basket. 3 of them are red. What is the probability of picking up a red apple?
扎扎爸不但概率差，连除法也不灵光，只好回答说：The probability is 3 out of 7.
扎扎回答说;
"Wrong! Your answer is fraction，not probability.
Its probability is unlikely.
If there were 4 red apples, its probability would be likely.
If there were 0 red apples, its probability would be impossible.
If there were 7 red ones, its probability would be certainly.
How come you don't know these, dady？”

就这样，概率学得很差的扎扎爸被扎扎补了结结实实一堂课。