题目

The position of secretary or personal assistant used to be the preserve of women, but now men are making their way in. The change is due partly to the highest rate of graduate unemployment and the growing awareness that salaries for PAs can reach £75,000 a year.Joshua Watson, 25, has been an executive (行政的) assistant to a female senior director at Barclays for 18 months, having previously worked as a PA. He does not see himself as working in a woman’s role. “I don’t feel that I’m treated any differently just because I’m male,” he said. “I don’t think that is an issue for由0，1，2，3，4组成的四位数中，出现含有数字0，且恰有2个数位上的数字重复的四位数的概率是___________。