1@rajat...
yeah, i solved it by ur method in d exam... juzz gave all those possibilities wid reference to manipal's post...
well, it's done... cool... :)
An unbiased die, with faces numbered 1,2,3,4,5,6 is thrown five times and list of five no.s showing up is noted, then...
1) The probability that among the no.s 1 to 6, only four no.s appear in d list is...
a) 883/7776 b) 3600/7776 c) 483/1296 d) 883/1296
2) The probability that five no.s appearing on d list are in a decreasing order is...
a) 1/1296 b) 1/7776 c) 1/216 d) 1/6
3) The probability that sum of five no.s on the list is 25 is
a) 256/7776 b) 358/7776 c) 126/7776 d) 728/7776
cheers...!!!
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18 Answers
11u know them
then y r u asking ????
TESTING US
mat kario mein to fail he ho jaaonga [2]
test others!!!!!!!!!!!!!
1
131. The probability that among the no.s 1 to 6, only four no.s appear in d list is...
total cases
6C4*4*5!/2!=3600
b)3600/7776
133) The probability that sum of five no.s on the list is 25 is
66661-------5
66652-------20
66553-------30
65554-------20
55555-------1
66634------20
66445-------30
total cases 126
c) 126/7776
11bhai aggar tu test kar raha to test kal board ke baad pakka denge
waise ur prob 1 and 2 r quite lengthy
1[9][9][9][9][9][9].......ya .........thanks i'lll try the others but tommorow becaz 2mmrw is our maths exams so have to leave now..bye..........[319].............
1hehe... dats a challenge, not a doubt...!!! [3]
waise bhi... try karne mein koi burayi nahi hain naa... [1]
how'll u learn to walk widout falling down atleast once...!!! aaj stairs pe se neechey gira [2], isliye ye quote yaad aaya [6]
11(2)
mohd saab
dekhiye
total cases is 6x6x6x6x6
probable cases is ..6,5,4,3,2 5,4,3,2,1 6,4,3,2,1 6,5,4,3,1 6,5,3,2,1 6,5,4,2,1
PROBABILITY = 6/6x6x6x6x6=1/1296
11oh haan perfectly decreasing nahin kaha tha
k
galti ho gayi [2]
1it's not given dat the no.s must b consecutive...
well, these are possible cases... 6,5,4,3,2 ; 5,4,3,2,1 ; 6,5,4,3,1 ; 6,5,4,2,1 ; 6,5,3,2,1 ; 6,4,3,2,1 ... total 6 cases...
hence answer is (a)
[1]
11@MATRIX
unbiased ka matlab hota hai impartial(jiss mein parciality na ho)
iska matlab probability of each case is same!!!
1unbiased means all d surfaces are perfectly smooth... i.e., the probability of occurence of any no. is same...
11mohd ji 2 hi to banenge
hore nahin ban rahe
aggar decreasing poocha hai 5 cases mein se aur haare pass 6 nos hai to it should be 2 na!!!!!!!!!!