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**In how many ways can 5 distinct Martians, ten distinct Vesuvians and eight distinct Jovians wait together in line if no two Martains stand together>**

**2. 10_p_5 = 10! & 5! but what about 8? and 2?**

**3. 10! = 10*9*8*7*6*5*4*3*2*1**

8! = 8*7*6*5*4*3*2*1

5! = 5*4*3*2*1

10*9 = 90/2 = 45?

8! = 8*7*6*5*4*3*2*1

5! = 5*4*3*2*1

10*9 = 90/2 = 45?

I am so lost.. I am not a programmer..but required to take this class for my major! Please anyone help me out??