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michelle_winner 发表于 2009-11-7 04:09

从韩国网上淘来的math JJ--11/05--分享给大家2-接上一个

[size=10pt]4. There is a bag which consists of 10 bulbs, out of which 2 is defective.
]+t REiLK0eU1M
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@ Q0{$C0d&|
o/FoF [size=10pt]If 3 bulbs are chosen at random without replacement,5c PHDES2B
[/size]%B7\&f\s
[size=10pt]then what is the probability that none of the three bulbs selected are defective? [/size]"BnE5t5P!]
[size=10pt]sol)
$Js%]A0nWXg [/size][font=Shruti][size=10pt][/size][/font]Q*I2Ko AM\$hJ,]H
[size=10pt]5. In a Isosceles triangle STU,
~N@3M4p!u-LO [/size]?Q
E:e!i
[size=10pt]the sides ST = SU and ‘p’ is any point on UT, then which of the following might be true? [/size]A;k6U?&Th(\2?:}v
[size=10pt]I. ST[/size][size=10pt] > PS [/size]
2t-s!E(B:Qt[ [size=10pt]II. PU > ST [/size]X}it$I(}"}Z
[size=10pt]III. PS > PT [/size]'bZ @!E S3` JjY
[size=10pt]A. Only I [/size]
*Z)S%an1^r [size=10pt]B. Only II [/size]
&d
l\0K'}4Z*kE [size=10pt]C. Only III [/size]D]'msgN%a!a!H
[size=10pt]D. Only I and II [/size]
2Bjt5u4npuuW [size=10pt]& so on……… [/size]N2xE ?-P6J3{
[size=10pt]sol) A [/size]
u Y4o#O{B,Y1H [font=Batang][size=10pt]이등변[/size][/font]
+~a ?X$Gl6]8N#a [font=Batang][size=10pt]삼각형[/size][/font][size=10pt] STU [/size][font=Batang][size=10pt]에서[/size][/font][size=10pt],-A9J4D S*g}#t m;p X
[/size]
2wp p;k-|+o [size=10pt]ST = SU [/size][font=Batang][size=10pt]이고[/size][/font][size=10pt], p [/size][font=Batang][size=10pt]는[/size][/font][size=10pt] UT [/size][font=Batang][size=10pt]에있는[/size][/font];Y5K_i i[+P
[font=Batang][size=10pt]점이다[/size][/font][size=10pt]. [/size][font=Batang][size=10pt]다음[/size][/font]
%nT eQ(e!X:j [font=Batang][size=10pt]중[/size][/font]K!tjb:v(w,g
[font=Batang][size=10pt]참인[/size][/font]
&eD9n z)PHI [font=Batang][size=10pt]것은[/size][/font][size=10pt]? [/size]s V#HX q
[size=10pt]I . ST > PS ([/size][font=Batang][size=10pt]참[/size][/font][size=10pt]) [/size]
WlZ$J4\PF.qG [size=10pt]II. PU> ST [/size][font=Batang][size=10pt]알[/size][/font]PvBiK\'_ E9v
[font=Batang][size=10pt]수[/size][/font]:]UzeB$yO9?B'm
[font=Batang][size=10pt]없다[/size][/font]
l
L5u[;J [size=10pt][/size]
:O"S
kH_:O!Cp;B5cj [size=10pt]III. PS > PT [/size][font=Batang][size=10pt]알[/size][/font]
1at*O2cB~ [font=Batang][size=10pt]수[/size][/font]%A%~:uLob7tb
[font=Batang][size=10pt]없다[/size][/font]
)l6s]7~6n%P7H'i [size=10pt][/size]
*BTd){]
R)M~M"A [size=10pt]0cU&HNTW
[/size]
%]H&sb)L"a:j [size=10pt]6. There are 67 children in a community.&Lqx:x!m pj
[/size]/NT"T'MURR k
[size=10pt]If 52 like biking, 21 like skating and 12 like both,5xbV |7N
[/size]
[ |
\LF5RRg [size=10pt]then number of children who like neither biking nor skating? [/size]
P3W0|2`&L4P [size=10pt](Similar to this) [/size]
f&LI6?(T [size=10pt]sol) 6 [/size][font=Batang][size=10pt]명[/size][/font]
+F,QJXT b [size=10pt][/size][gP9_Kl8k2A
[font=Batang][size=10pt]한[/size][/font]0g{j5l"xv,F4E
[font=Batang][size=10pt]단체에[/size][/font]
3qQ1UI2r)Ul({ [font=Batang][size=10pt]어린이[/size][/font][size=10pt] 67 [/size][font=Batang][size=10pt]명이[/size][/font]
C
~$wjD
[font=Batang][size=10pt]있다[/size][/font][size=10pt]. [/size]
lN'w1Z%fr6B [size=10pt]52 [/size][font=Batang][size=10pt]명은[/size][/font]
ef"t6Cz{ [font=Batang][size=10pt]자전거를[/size][/font]
]&T*z s_*f6jI.WA [font=Batang][size=10pt]좋아하고[/size][/font][size=10pt], 21 [/size][font=Batang][size=10pt]명은[/size][/font]
[Fe?4V`%A)m [font=Batang][size=10pt]스케이팅을[/size][/font]^3c$w\@+b
[font=Batang][size=10pt]좋아하고[/size][/font][size=10pt], 12 [/size][font=Batang][size=10pt]명은[/size][/font]0qi5\E A6V9Cv
[font=Batang][size=10pt]둘[/size][/font]:aSh(XM
[font=Batang][size=10pt]다[/size][/font]#W6[5F.ew
[font=Batang][size=10pt]좋아한다[/size][/font][size=10pt]. [/size]
5U-c#t.v;R]~ [font=Batang][size=10pt]자전거[/size][/font][size=10pt], [/size][font=Batang][size=10pt]스케이팅[/size][/font]| gz,bbP
[font=Batang][size=10pt]모두[/size][/font]R2cqjo5F
[font=Batang][size=10pt]좋아하지[/size][/font]0j&R2\6io0{C1d9L6Q
[font=Batang][size=10pt]않은[/size][/font]6ce%fiA L/Vz
[font=Batang][size=10pt]어린이의[/size][/font][i#crTTcE
[font=Batang][size=10pt]수는[/size][/font][size=10pt]? [/size]&IG5})S ~-J ]
[size=10pt]S U B = B(52)+S(21)-B*S(12) = 61 [/size]
u
N8J
A]`6S [size=10pt]
`HzY XSKH.Z0bB;n [/size]
(Hk W A#D_ w [size=10pt]7. Given Set P = {1.3, 0.9, 1.5, 1.1} and [/size]L bw&J4lc#T:}
[size=10pt]Set Q = {1.3x, 0.9x, 1.5x, 1.1x}, then [/size]
I%q w2}8LKsa [size=10pt]Col[/size][size=10pt] A: Standard deviation of P [/size]
|+T'M5v,h"c [size=10pt]Col[/size][size=10pt] B: Standard deviation of Q [/size]
0M3|ZB7^vCE.W [size=10pt]sol) D, The relationship cannot be determined from the information given. [/size]
`En)A6L/A(C`BS [font=Batang][size=10pt]변수들간의[/size][/font]
{%B1\Z2KU [font=Batang][size=10pt]편차도[/size][/font][font=宋体][size=10pt]…[/size][/font][size=10pt]x [/size][font=Batang][size=10pt]배[/size][/font] dT0o,zH9Yh8lex,B:Z
[font=Batang][size=10pt]변한다[/size][/font][size=10pt]. [/size]T
~lSPM1m Y;S(s
[size=10pt]&dU.`w CR-H
[/size]
1D P1sidX [size=10pt]8. Given that there are 3 hooks and 5 pictures,
:` bX7@8k [/size]%Q9[G)TqK$C
[size=10pt]find the numbers of ways to select 3 picture combinations? [/size]+} T%LWo
[size=10pt]sol) 10 [/size][dDtd8q0@^
[size=10pt]3 [/size][font=Batang][size=10pt]개[/size][/font]0l,f`k;Q,O
[font=Batang][size=10pt]걸이와[/size][/font][size=10pt] 5 [/size][font=Batang][size=10pt]개[/size][/font]
6Z6} p|8w$Bfh;@q3d|Y [font=Batang][size=10pt]그림이[/size][/font]
]xm,Gg2L [font=Batang][size=10pt]있다[/size][/font][size=10pt]. [/size]
x8R;sh:z'N [size=10pt]3 [/size][font=Batang][size=10pt]개[/size][/font]'y1emGl(u8S5V!yN
[font=Batang][size=10pt]그림을[/size][/font]
9P Jd.o;E8I/_Dcg [font=Batang][size=10pt]선택해서[/size][/font]-R aC'~h {
[font=Batang][size=10pt]거는[/size][/font]Ge\9V:E.QBN
[font=Batang][size=10pt]방법의[/size][/font]_!TG%@wTb
[font=Batang][size=10pt]수는[/size][/font][size=10pt]? [/size]
H+? B1N[4d [size=10pt]5C3 = 10 ([/size][font=Batang][size=10pt]순서를[/size][/font]e4B+D'?Cm
[font=Batang][size=10pt]생각하지[/size][/font]
G!sr0A&`6X
s [font=Batang][size=10pt]않고[/size][/font][size=10pt], [/size][font=Batang][size=10pt]중복을[/size][/font]#p:M4tG7U
[font=Batang][size=10pt]허락하지[/size][/font]
A2cnn-fXCi3k6y [font=Batang][size=10pt]않을[/size][/font]A g6NHmV3\
[font=Batang][size=10pt]때는[/size][/font][size=10pt], Combination)[/size]

yicongl 发表于 2009-11-8 12:08

顶一下...LZ辛苦了

superkathy 发表于 2009-11-8 12:22

thank u ~~~~~

nitgonglei 发表于 2009-11-9 09:57

sh*t一样的简单

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