Can someone help me permutations and combination

[Robertwellson]

I don't understand 9) d
The answer is48

 

[pka]

We cannot see 6d. Did you mean 9d ?

 

[Robertwellson]

We cannot see 6d. Did you mean 9d ?

yes 9d was a typo sorry

 

[Dr.Peterson]

The number can be either EOEO or OEOE. Count ways to choose (a) which arrangement to use, (b) how to arrange the 2 even digits, and (c) how to arrange 2 of the 4 odd digits.

 

[Robertwellson]

The number can be either EOEO or OEOE. Count ways to choose (a) which arrangement to use, (b) how to arrange the 2 even digits, and (c) how to arrange 2 of the 4 odd digits.

Sorry I'm still a little confused do I write it as 2P2*4P2= 24, where did I do wrong?

 

[Robertwellson]

The number can be either EOEO or OEOE. Count ways to choose (a) which arrangement to use, (b) how to arrange the 2 even digits, and (c) how to arrange 2 of the 4 odd digits.

Oh I solved it, I just assumed is another case thank you much appreciated for your help.

 

[Dr.Peterson]

Oh I solved it, I just assumed is another case thank you much appreciated for your help.

Good. Presumably you saw that you had to multiply your 24 by 2, for the two choices, EOEO or OEOE.