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2010年和2011年佛山市的中考题中有同一类问题引起了我的注意。(2010年)研究“掷一个图钉,钉尖朝上”的概率,两个小组用同一个图钉做实验进行比较,他们的统计数据如下,请你估计第一小组和第二小组所得的概率分别是多少?
Foshan City in 2010 and 2011 in the same type of questions caught my attention. (2010) study the probability of “throwing a thumbtack pointing up”, the two groups experiment with the same thumbtack and their statistics are as follows. Please estimate the probability of the first group and the second group What is the probability?