[求助]请各位NN们帮帮我讲讲几道数学题

zhangzaoli · 发表于 2009-8-26 23:15:00

各位NN们，我9月7号就要考试了，现在做题做得晕头转向。我数学一直都不好，可以在你们看来最简单的题目我都不太会解，特别是概率，排列组合还有DATA EFFECIFENCY的题目，可否请各位有空的话帮我讲讲如下题目该如何解答？小女子将感激不尽！

1. Three digit: KSS is the sum of KS&RS, the following which must be true?
k=2 r=9 s=5

2. Function f defined for each positive 3-digit n by f(n)=2^x3^y5^z. Where x,y,z are the hundreds, tens and units of n. If m&v are 3-digit positive integers, such f(m)=9f(v),what is m-n?

3. IF n is positive integerm what us the reminder when 7^4n+36^n is divided by 10?

4. If all positive integer m&v, the expression mTv represents the reminder when m is divided by v. What is the value of {(98@33)@17}-{98@(33@17)}?

5. How many integers from o to 50 (inclusive) have a reminder of 1 when divided by 3?

6. k>1, the symbol k donates the product of all the fractions of the form 1/t (1<=t<=k), what is the value of 5^*/4^*?

7. A research:each person in certain experiment with a code consisting either a single letter or a pair of distinct letters written in alphobetic order. What is the least numbers that can be used in 12 persons and each person receives a different code?

8. 24 balls:12 reds and 12 blues.Is 2 balls are picked in random and without replacement. what is the probability that both balls will be red?

9. Last year in a group of 30 businesses. 21 reported a net profit report &15 had investment. How many of the businesses did not report a net profit nor invest in foreign market?
1) 12 of 30 businesses reported in the net profit
2) 24 of 30 businesses reported a net profit or invested in foreign or both.

10. A probability is 0.54, B is 0.68. What is the greatest possible value that neither A&B will occur?

11. M={-6,-5,-4,-3,-2} N={-2,-1,0,1,2,3}. what is the probability that the product of two

integers is negative?

12. 30 members formed 3 committes: M,S,R, which has 8,12,15 people repectively. If the no. of M is on either of the other 2 committes, what is the greatest possble no. of members in the clubs who are none of the committes?

13. Six cards from 1 to 6. First card is drawn and then put back into the bowl, then a second card is drawn.If the cards are drawn at random and if the sum of the no. on the card is 8. What is the paobability of two cards drawn is numered 5?

[求助]请各位NN们帮帮我讲讲几道数学题

[求助]请各位NN们帮帮我讲讲几道数学题

所属分类: GMAT考试

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