robability 3

3)a sum of money is rounded off to d nearest rupee d rob that d roundd off error is at most 10 paise is ?

12 Answers

62
Lokesh Verma ·

depends on the definiton of rounding off.. there are 2-3 in the market place so i wud be careful on what is the definiton of rounding off!

1
°ღ•๓яυΠ·

so .....d q is wrng ? acc 2 u ?

1
Rohan Ghosh ·

then assuming we deal with one paise each

suppose the no. of paise is x
then x can have 100 values (0to 99)

among these the only possible cases (w.r.t question are)

x=0to 10 or 90 to 99 = 20 values

hence probability=20/100=1/5

62
Lokesh Verma ·

see there ar ecases..

if u remmber rounding

1.5=2 and 2.5 is also 2

so that is one definiton

there is another definiton that says 1.5=2 and 2.5=3

but i think this problem is aobut solving it using the second definiton (evn though 1 is the more correct way!)

1
°ღ•๓яυΠ·

y only these possible cases y nt neothr >?

1
Rohan Ghosh ·

but that doesnt affect the answer

62
Lokesh Verma ·

Rohan: will 1.06 give 1.1 or 1?

i think it should be 0,1,2,3,4,5,96,97,98,99 which will round of to the integer values..

1
Rohan Ghosh ·

but that doesnt affect the answer

62
Lokesh Verma ·

hmm.. yeah it does

bcos 1.95 will get aprroximated to 2 in one case

and it will get approximated to 1.9 in another..!!

So the answer will vary to 11/100 or 10/100

1
varun ·

I think the q is that w/e be the sum of money, it is being rounded off to nearest integer. What is the prob of the such that rounding off error is atmost 10 paise...

62
Lokesh Verma ·

oops.. yes varun.. i got ur point!!

62
Lokesh Verma ·

wasnt reading carefully enuf.. :(

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