Qualification > Math
S1 and S2 DOUBTS HERE!!!!
solo_G:
--- Quote from: Freaked12 on May 21, 2010, 05:06:58 pm ---P(x=n)<0.05
= (0.75)^n<0.05
take log on both sides
log(0.75)^n<log(0.05)
nlog(0.75)<log(0.05)
n(-0.28768)<-2.99573
when we convert negative to positive the inequality reverses
n>2.99573/0.28768
n>10.4134
n>11
--- End quote ---
thanx freaked!! hehehe nice nickname!! ;D +1 rep ;D :D
solo_G:
aight people anotha Qs ;D
its from nov 09 varient 1
find how many numbers between 5000 and 6000 can be formed from the digits 1,2,3,4,5,6 if repition of digits is allowed......i dnt get why is it 6 to da powr of 3? ??? ??? ??? >:(
astarmathsandphysics:
must start with 5 then there are three other digits from a choice of 5 so 5*4*3
this is in the ms. You are looking at the wrong answer
solo_G:
--- Quote from: astarmathsandphysics on May 23, 2010, 07:32:23 am ---must start with 5 then there are three other digits from a choice of 5 so 5*4*3
this is in the ms. You are looking at the wrong answer
--- End quote ---
oh sorry sir i meant for the second question.........if reptitions ARE allowed....thanks
immortal:
--- Quote from: solo_G on May 23, 2010, 07:02:05 am ---aight people anotha Qs ;D
its from nov 09 varient 1
find how many numbers between 5000 and 6000 can be formed from the digits 1,2,3,4,5,6 if repition of digits is allowed......i dnt get why is it 6 to da powr of 3? ??? ??? ??? >:(
--- End quote ---
Its a 4 digit num between 5000-6000
So da last 3 digits r changed wit those of da range..
Dat is each zero haz 6C1 different variables.
4 all 3 zero's 6C4*6C1*6C1=63
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