A box contains 10 balls numbered from 1 to 10 inclusive. If Ann removes a ball at random and replaces it, and then Jane removes a ball at random, what is the probability that both women removed the same ball?

A. 1/100

B. 1/90

C. 1/45

D. 1/10

E. 41/45

答案：D

解析：这个题其实只需要考虑Jane拿到Ann一样的球的概率，无论Ann拿的是哪个球，Jane都有十分之一的机会和她拿到一样的。

When the even integer n is divided by 7, the remainder is 3.

Quantity A：The remainder when n is divided by 14.

Quantity B：10

A. Quantity A is greater.

B. Quantity B is greater.

C. The two quantities are equal.

D. The relationship cannot be determined from the information given.

答案：C

解析：因为该数为偶数，而余数为3，因此商与除数的乘积必为奇数，因此商必为奇数。设商为2k 1(k为大于等于零的整数)，则该偶数可表示为7(2k 1) 3，化简，得14k 10.因此余数必为10。