anonymous
  • anonymous
pre calculus help...
Algebra
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
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anonymous
  • anonymous
@TheSmartOne
anonymous
  • anonymous
@Nnesha can you please help with this, what symbol is that?

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Nnesha
  • Nnesha
P=permutation collections of things for permutation order is important (you will need this for word problem) formula to solve \[\huge\rm P(n,r)=\frac{ n! }{ (n-r)! }\]
Nnesha
  • Nnesha
\[\huge\rm ^np_r\]
anonymous
  • anonymous
what does n and r stand for?
Nnesha
  • Nnesha
\[\huge\rm ^np_r\] \[\huge\rm ^3P_2\] in this example n is 3 and r is 2
Nnesha
  • Nnesha
|dw:1442509093003:dw|
anonymous
  • anonymous
|dw:1442509296921:dw|
Nnesha
  • Nnesha
well the n represent total amount(objects taken) of something and r represent selecting numbers of something at a time hm
Nnesha
  • Nnesha
ye that's ur question now use the formula i gave for both top and bottom of the fraction
Nnesha
  • Nnesha
what is `1-` ?
Nnesha
  • Nnesha
question number ?
anonymous
  • anonymous
no, it's part of the equation
anonymous
  • anonymous
|dw:1442509560692:dw|
Nnesha
  • Nnesha
yes right do you know how to solve taht by hands
anonymous
  • anonymous
|dw:1442509623352:dw|
anonymous
  • anonymous
if i mess up please stop me
anonymous
  • anonymous
|dw:1442509723233:dw|
Nnesha
  • Nnesha
looks right did you use calculator for 6!(6-4)!
Nnesha
  • Nnesha
?
anonymous
  • anonymous
and now since 1- is part of the equation|dw:1442509877489:dw|
anonymous
  • anonymous
yea i used a calculator
anonymous
  • anonymous
|dw:1442509979104:dw|
anonymous
  • anonymous
that's correct right?
Nnesha
  • Nnesha
oh okay well you can do it by hands 6!= 6 · 5· 4· 3· 2· 1 meaning multiply by previous number
Nnesha
  • Nnesha
wait is \[1-\frac{ 1 }{ 56 }\] like his ?
Nnesha
  • Nnesha
this*
anonymous
  • anonymous
yea because the 1- was part of the equation
Nnesha
  • Nnesha
yes right 55/56
anonymous
  • anonymous
sweet thanks again!
Nnesha
  • Nnesha
yw :=)

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