题目

After losing his close friend and his mother in the same year, Dylan changed（改变）his lifestyle by traveling the world with his pet ferret（雪貂）.“It was terrible for me, but I didn’t want to be grieved all the time,” said Dylan. “I needed to start a new life.”So Dylan gave up（放弃）his job and sold his house and cars. Finally, he got $19, 500 for his dream trip. Then he traveled around the world with his “friend”: the ferret Bandit.Setting off（出发） in February 2018, the two traveled to 11 countries, such as Germany, Sweden, England and Italy, in 8 months. 一个不透明的口袋里装有除颜色外其余都相同的10个白球和若干个红球，在不允许将球倒出来数的前提下，小亮为了估计其中的红球个数，采用如下方法：先将口袋中的球摇匀，再从口袋里随机摸出一球，记下颜色，然后把它放回口袋中，不断重复上述过程，小亮共摸了1000次，其中有200次摸到白球，因此小亮估计口袋中的红球大约为(　　)A. 60个 B. 50个 C. 40个 D. 30个