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19. vOkhw;W khwp Y apdJ epfo;jfTg; guk;gy; fPNo jug;gl;Ls;sJ.
Y -1 0 1 2
P(y) 2C 2 3C 2 + 2C C 2 -2C C
Capd; ngWkhdk; ahJ
(1) - 1/2 (2) 1/2 (3) 1/3 (4) 1/6 (5) 1
20. X vd;w vOkhw;W khwpapdJ vjpu;ghu;j;j ngWkhdk; E (X) = 0.4 khww;wpd; V (x)= 0.84 MFk;. Y
vd;w vOkhw;W khwpahdJ Y = 2X +3 vd tiuaWf;fg;gbd; Y apdJ vjpu;ghu;j;j ngWkhdk;>
khww;wpd; vd;gd KiwNa
(1) 3.8 mj;Jld; 6.36
(2) 3.8 mj;Jld; 3.36
(3) 10.6 mj;Jld; 6.36
(4) 0.4 mj;Jld; 0.84
(5) 0.8 mj;Jld; 1.68
21. A, Bvd;gd rhuh epfo;r;rpfs; vdpd;> gpd;tUk; $w;Wf;fspy; vJ gpioahdJ
(1) P( A B)
P(
A)
P(
B
)
(2)
(3)
P( A
B)
P(
A)
P(
B | A)
P( A B)
P(
A)
P(
B)
(4) P( A B)
0
(5) P( A | B)
P(
A)
22. gRf;fspd; gz;iz xd;wpy; 60% khdit Fwpj;j Nehapid nfhz;bUe;jd. 10 gRf;fis
nfhz;l xU khjpupapy; Nehapy;yhj gRf;fspd; vz;zpf;if Y apdhy; Fwpf;fg;gLfpd;wJ.
vOkhw;W khwp Yapid tpgupg;gjw;F kpfTk; nghUj;jkhd epfo;jfT guk;gyhdJ.
(1) n = 10, P = 0.6 cila