Re: [計量] CAT計量請教

看板GRE (GRE入學考試)作者eadanlin (=口=)時間16年前 (2009/06/30 07:39)推噓1(1推 0噓 0→)

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※ 引述《think12381 ()》之銘言： : 不好意思請教各位幾題CAT上的計量問題 : 有些是解法不確定有些是想不出來 : 麻煩各位了~謝謝~ : 1 A the percent increase of the area of a circle if its diameter is double : B 400 : pi * r^2 -> 4 * pi *r^2 so (1+x)/1 = 4/1 x = 3 => 300% B大請問是這樣解嗎? 對 : 2 of the 120 people in a room. 3/5 are women, and 2/3 are married : A: max number of women in the room who could be unmarried : B: 72 : men women total : married 80 : unmarried max 40 40 : 48 72 120 so max unmarried women = 40 這樣解嗎? 應該吧~ : 3 three friends are playing a game in which each person simultaneous displays : one of three hand signs: a clenched first, an open palm, or two extended : fingers. how many different combination of signs are possible? : ans 10 誰出什麼不重要設1剪刀 2石頭 3布 1 2 3 1 1 2, 1 1 3, 2 2 1, 2 2 3, 3 3 1, 3 3 2 1 1 1, 2 2 2, 3 3 3 共十種 : S ^ : | ^ : 4 | ^ in the figure arc,SBT is one quarter of a : A |\ ^ B cicle with center R and r = 6. if the length : | \ ^ plus the width of rectangle ABCR is 8. then : | \ ^ the perimeter of the SBTCA is : | \ ^ : |____\________^ T ans 10+3*pi 請問AC線段怎麼算 : R C : 5 A gardener is going to plan 2 red rose and 2 white rose. : if the gardener is to select each of the rose randon, one at a : time and plant them in a row, what probability that the 2 rose in : the middle of the row will be the red ones? : ans 1/6 C(4,2)=6 1/C(4,2) = 1/6 : 6 the probabilities of two independent events are p and 2p respectively : with 0<2p<1 : A P : B 1-P ans B大 0<2p<1 0<p<0.5................A -0.5<-p<0 0.5<1-p<1..............B <- larger : 7 how many minutes does the mimute hand of a clock take to meet the hour hand : form 8.00 to 9.00 : ans 480/11 : 不好意思麻煩各位了設m分鐘相遇時分針走了m*(360度/60分) = 6m 時針走了m*(360度/12/60分) = 0.5m 然而時針是從八點的位置起跑所以等式: 6m = 0.5m + 8點*(360度/12) 5.5m = 240 m = 240/5.5 = 480/11 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.193.181.56