For Question 4, write your answer in the box.
The average of a set of six integers is 38. When a seventh number is included in the set, the average of the set increases to 47. What is the seventh number?
【正确答案】
101
【答案解析】
设前六个数之和为x，第七个数为y，那么，根据题目中已知的数量关系可列式：x/6=38.（x+y）/7=47。解得x=228，y=101，因此第七个数为101。