请教两道题~~

1.All ofthe stocks on the over-the counter market are designated by either a 4-letter or a 5-letter code that is created by using the 26 letters of the alphabet, which of the following gives the maximum number of different stocks that can be designated with these codes?

A 2(26^5)

B26(26^4)

C27(26^4)

D26(26^5)

E27(26^5)

这道题我不太理解题目的意思，没有什么思路，请高人帮忙指点一下~~答案是C

2。A certain city with a population of 132000 is to be divided into 11districts , and no district is to have a population that is more than 10 percent greater than the population of any other district. What is the minimum possible population that the least populated district could have?

A 10700

B 10800

C10900

D11000

E11100

这道题有没有简便算法？怎么算的？答案是D

1 26^5+26^4=26^4(26+1)

2 X>(132000-X)0.1 X>12000