[計量] 請教各位板友計量問題謝謝

看板GRE作者leobigpig (leobigpig)時間13年前 (2010/09/01 23:02)推噓0(0推 0噓 0→)

留言0則, 0人參與討論串1/3 (看更多)

這邊先感謝昨天板友所講解的解題,我真的有搞懂昨天的問題因為數學超爛,所以每天真算是在狂算數學今天有些題目在這邊請教 for how many different results of X1 + X2 cane be generated from set X1:{7,8,9,10,11} and set X2: {25,26,27,28}? Ans:8 There is a set five numbers, in which the average (arithmetic mean) of the two greatest numbers is 20, the median is 7 and mode is 4. What is the average (arithmetic mean) of the five numbers? 不好意思我題目不太懂 Ans:11 If there are 8 people at the party and each of them shakes hands exactly once with each at the party, then what is the total number of handshakes exchanged at the party? Ans:28 Half of the toys in a bag are small size, and a quarter of the toys in the same bag are red toys. Column A : The fraction of the toys in the bag which are both red and small Column B : 1/8 And:D 這題不可以用兩個圈圈中間的交集算出來嗎? X is a two-digit number, and the product of 3 and X has 9 in its units place. Column A : 3X Column B : 69 Ans: D 題目也解不太出來 Given that f(n+3)=F(n), F(1)=6,f(0)=5 and f(1)=4, then what is the value of f(8)? And:6 In the xy-plane, the distance between (4,8) and a certain point on the x-axis is 4√5 Column A : The x-coordinate of the point on the x-axis Column B : 8 A certain set contains five integers, of which the median and the mode are 32 and 35, respectively. If the average (arithmetic mean) of the set is 30, then what is the lest possible value of the set? Ans: 17 If a square with side S is inscribed in a circle, then what is the area of the circle, in term of S? Ans: 1/2*S^2*π A group of people what to rent a loge at a ski resort for $360. If 2 more people join the group, each person·s share for the rent will be reduced by $9. How many people were in the original group? Ans:8 If for 3 consecutive years a commodity·s value increase by 20 percent of its value the previous year, then it value after the third increase is approximately what percent greater than its value before the first increase? Ans:73% 這題目我不清楚 How many square tiles, each with side 3/4 foot, are needed to tile a square floor of side 3 feet? Ans:16 At company X, the average (arithmetic mean) salary of the female employees is 70 percent of the average salary of the male employees, but the total pay roll for the female employees is 120 percent of the total payroll for the male employees. What is the ratio of the number of male employees to number of female employees? Ans:7/12 At a certain school, the school day begins at 8:15 a.m. and end at 3:15 p.m. the day consists of a 10 minute homeroom period, a 45 minute lunch period, and 8 class period. If the students are allowed 5 minutes to pass from one room to the next after each period except the last, how many minutes long is each class period? Ans:40 A jeweler bought necklaces for $40 each. He then sold 4/5 of them for $80 each and the rest for $30 each. How many necklaces did the jeweler buy if he received $1500 more than he paid for them? Ans:50 If N=(-2)^X, where x is a negative integer, M is the difference of the greatest value of N and the least value of N. Column A : M Column B : 3/4 我不懂題目 In a club, the average (arithmetic mean) age of 35 females is f, and the average (arithmetic mean) age of remaining 45 males is m, where f is greater than m. Column A : The average age of all the 80 members in the club Column B : (f+m)/2 When n articles are sold for p dollars each, the revenue obtained from the sales is $1 more than it would be if the price per article were $1 higher and one less article were sold. Which of the following gives n in terms of p? Ans: n = p 文字題就是讓我大傷元氣的數學,可以請教題目意思嗎? 謝謝 -- http://www.youtube.com/watch?v=VJMbk9dtpdY