probability ka adda

Here i will be posting ques on probability which could prove to be useful 4 every1
Do try to give explanations if u can
options will be given on demand
[1]

Q1
If the papers of 4 students can be checked by any one of 7 teachers , then the probability that all the 4 papers r checked by exactly 2 teachers

80 Answers

11
Mani Pal Singh ·

options r
(A)43/100
(B)61/150
(C)83/150
(D)87/200
(edited)[2]

13
Двҥїяuρ now in medical c ·

(D)n-1-\frac{k}{2}(k-1)

11
Mani Pal Singh ·

sorry the question have been edited
now try this one[1]

11
Mani Pal Singh ·

yaar abhi yeh maine ques na banaye hain na book se uthai hain

these r 4m my tests

33
Abhishek Priyam ·

I think Rajat's answer is right... and mani check ur options....

or recheck the data of questions... :)

11
Mani Pal Singh ·

SACCHI BAATAON MERE KO BHI NAHIN AATA [3]
TABHIE TO YEH THRAD BANAYA HAI
IIT MEIN ISKI 20-25 MARKS KI WEIGHTAGE HAI[1]

koi baat nahin
ek random tukke ke saath random explaination bhi de do

1
skygirl ·

[3]

mereko probability aur permutation ni ata [3]

woh random guess tha [3]

11
Mani Pal Singh ·

SKY JI ABHI MERE PASS ANSWER NAHIN HAI
KAL TAK MILENGE ANSWERS MUJHE

U CAN POST UR WORK AND WE SHALL VERIFY IT TOMORROW[1]

1
skygirl ·

is the ans C?

11
Mani Pal Singh ·

The options to the Q4 r
(a)5m/m+8N
(b)3m/m+8N
(c)7m/m+8N
(d)9m/m+8N

1
The Scorpion ·

i've a li'l doubt... r d 2 teachers fixed or any 2 teachers can perform d event...!!???

1
The Scorpion ·

@tapan...

well, i'm not so sure about dat term... my first answer is wrong since it also includes d cases when all d 4 papers are evaluated by only one teacher... which is not d case...

in second answer... first i selected 2 papers 4m d 4... gave each teacher one... then distributed d other 2 papers randomly...

but dis also seems wrong... let me think further...!!!

21
tapanmast Vora ·

Mani options de yaar lagta hai HUNDRED percent kuch rong hai........

I m sure ans : 7C2.2^4 / 7^4

1
°ღ•๓яυΠ·

arey prob is like d prob that u get a rite answer is less :P
so optionz will work bettr

1
The Scorpion ·

hmmm... now i must solve dis... sab guesses galat... [3] [4]

well, provide d options if possible...!!!

11
Mani Pal Singh ·

nope ur answers r wrong

option thodi deer mein de doonga

1
The Scorpion ·

okayyy... here goes another answer...

7C2.4C2.2^2 / 4^7...!!!

1
°ღ•๓яυΠ·

3/10

jaldi optionz de ni toh hum tukke marte jayenge :P

21
tapanmast Vora ·

mani to i guess ans by mohd. crrct re......

OPTIONS he to do

11
Mani Pal Singh ·

@ MR MOHD
the 2 teacher r not fixed!!!!!!!!!!

11
Mani Pal Singh ·

now i will give the options after 5 mins :P

11
Mani Pal Singh ·

MOHD saab sorry not the answer[2]

1
°ღ•๓яυΠ·

oyeeeeeeeeee answer is E kya options de .meko answer A aara hai :P

11
Mani Pal Singh ·

Akand i interpret is as it given for only 1 subject(understood)

1
The Scorpion ·

Ans. : 7C2.2^4 / 7^4 ...!!!

11
Mani Pal Singh ·

no miss unnamed ,integrations .........................
the answer is (E)[1]

but this is not the answer[2]

1
Akand ·

is dere only 1 paper foe each student......i mean is he writin only one exam or 5 subjects like us???????????????

this doubt might be dumb but anyways a doubt is always a doubt hehe

1
°ღ•๓яυΠ·

btw saare subjcts ke papers :P

is d answer 3/5 ?

11
Mani Pal Singh ·

bhai IIT ka paper tunne bhi dena hai

if if u see any ques lash upon it

i will be glad to see an explained solution !!!!!!!!!![2]

21
tapanmast Vora ·

this ur dbt or 4 juniors

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