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\[P(1\ raw)=\frac{3C1\times 9C5}{12C6}\]

i dont understant this formulae

hypergeometric*

its 0.4090 so this is the required answer or do i have to do something more

The rounded decimal answer is 0.4091. The exact answer is the fraction
\[\frac{9}{22}\]

ok thank you very much now i got it

You're welcome :)

but my answer got wrong

can you recheck it plz

The answer 9/22 is correct. Are you sure that you copied the question correctly?

yes infact i did

What other answer do you have?

i tried yours

i mean what could be wrong here

How did you submit the answer? Did you use a decimal value or a fractional value?

no worries :)

thanks perl