TNPSC Probability Study Hints



Probability Question for TNPSC Exams
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epfH;jft[


1 xU gfil cUl;Ljypd; TWbtsp S = {1,2,3,4,5,6}= 6.

2 xU ehzak; Rz;Ljypd; TWbtsp S = {H,T}= 2

3 ,uz;L gfil cUl;Ljypd; TWbtsp S ={HH,HT,TH,TT}=4

4 epfH;jft[ P(E) = n(E)/n(S)

5 cWjpahd epfH;r;rpapd; epfH;jft[ = 1

6 ,ayhj epfH;r;rpapd; epfH;jft[ = 0

7 epfH;jft[ = 0<---p(E)<---1 ,ilapy; mika[k;. P(E---) = 1-P(E)

8 xU gfil cUl;Lk; nghJ 3 tpH epfH;jft[ = 1/6

9 xU gfil cUl;Lk; nghJ xw;iwvz; tpH epfH;jft[ = 3/6 = ½

10 ,uz;L ehza';fs; xnu neuj;jpy; Rz;Lk;nghJ ,uz;L jiy fpilf;f epfH;jft[ = {HH,HT,TH,TT}=1/4

11 1 Kjy; 50 tiu cs;s vz;fspy; 5 My; tFgLk; vz;fspd; epfH;jft[ S ={5,10,15,20,25,30,35,40,45,50} = 10/50 = 1/5

12 |d;W ehza';fs; Rz;Lk; bghGJ xnu xU jiy fpilf;f epfH;jft[ = 3/8

13 ehd;F ehza';fs; Rz;Lk; bghGJ xnu xU g[{ tpH epfH;jft[ = 4/16 = ¼

14 rktha;g;g[ Kiwapy; njh;e;bjLf;fg;gLk; yPg; tUlk; 53 "hapw;WfpHik ,Uf;f epfH;jft[ = 2/7

15 rktha;g;g[ Kiwapy; rhjhuz tUlk; 53 "hapw;WfpHik ,Uf;f epfH;jft[ = 1/7

16 ,U gfilfs; cUl;Lk; nghJ ,uz;L gfilfspYk; xnu vz; ,Uf;f epfH;jft[ = 1/6

17 ,uz;L gfilfs; cUl;Lk; nghJ KG vz;fspd; TLjy; 12 tu epfH;jft[ =1/36

18 epfH;jftpd; Tl;ly;tpjp P(AUB) = P(A)+P(B)-P(AnB)-----

19 xd;iw xd;W tpyf;Fk; epfH;r;rpf;fhd epfH;jft[ Tl;ly;tpjp P(AUB) = P(A)+P(B)

20 1Kjy;50 tiu cs;s vz;fspy; mJ 7d; kl';fhf ,Uf;f epfH;jft[ = 7/50