2017年備考GMAT數學練習題
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GMAT數學練習題一There are 8 magazines lying on a table; 4 are fashionmagazines and the other 4 are sports magazines. If 3 magazines are to be selected at random from the 8 magazines, whatis the probability that at least one of the fashion magazines will be selected?
A. 1/2
B. 2/3
C. 32/35
D. 11/12
E. 13/14
答案
參考答案:E
題目翻譯:桌子上八本雜誌,四本時尚四本體育。隨機三本,至少一本時尚的機率。
題目全解:1減去一本時尚沒有的機率=1-(4/8)*(3/7)*(2/6)=13/14。
GMAT數學練習題二Is thesum of p^2 and q^2 greater than 1?
(1) pis greater than 1/2.
(2) qis greater than 1/2.
ement (1) ALONE is sufficient, but statement (2) alone is notsufficient.
ement (2) ALONE is sufficient, but statement (1) alone is notsufficient.
C. BOTHstatements TOGETHER are sufficient, but NEITHER statement ALONEis sufficient.
D. EACHstatement ALONE is sufficient.
ements (1) and (2) TOGETHER are NOT sufficient.
答案
參考答案:E
題目翻譯:p方加q方大於一嗎?
題目全解:P大於2分之1,p方大於4分之一;q大於2分之1,q方大於4分之一,p方加q方就大於2分之一,可比一大可比一小。一二條件獨立也同理,選E.
GMAT數學練習題三What isthe median number of employees assigned per project for the projects at CompanyZ?
(1) 25percent of the projects at Company Z have 4 or more employees assigned to eachproject.
(2) 35percent of the projects at Company Z have 2 or fewer employees assigned to eachproject.
ement (1) ALONE is sufficient, but statement (2) alone is notsufficient.
ement (2) ALONE is sufficient, but statement (1) alone is notsufficient.
C. BOTHstatements TOGETHER are sufficient, but NEITHER statement ALONEis sufficient.
D. EACHstatement ALONE is sufficient.
ements (1) and (2) TOGETHER are NOT sufficient.
答案
參考答案:C
題目翻譯:公司Z,做項目的員工的中位數是幾?
題目全解:(1) 25 percent of the projects at Company Z have 4 or more employees assigned to each project. Not sufficient on its own.
(2) 35 percent of the projects at Company Z have 2 or fewer employees assigned to each project. Not sufficient on its own.
(1)+(2) Since 35% of of the projects have 2 or fewer employees and 25% of the projects have 4 or more employees, then 100%-(25%+35%)=40% of the projects have exactly 3 employees assigned to each of them. So, the median number of employees assigned per project is 3. Sufficient.
GMAT數學練習題四What isthe sum of the integers from -190 to 195, inclusive?
A. 0
B. 5
C. 375
D. 875
E. 965
答案
參考答案:E
題目翻譯:負190到正195,整數的和是多少呀?
題目全解:-190到190都抵消了,答案是191+192+193+194+195=965.
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