Is this correct? (1 Viewer)

Andy005 · Apr 15, 2017

I'm unsure if the working out is correct.

Drongoski · Apr 15, 2017

Correct.

Drongoski · Apr 15, 2017

Correct. Can also do like this:

$\therefore \frac {n(n-1)(n-2)(n-3)(n-4)}{1\times 2\times 3\times 4\times 5} = 30 \times \frac {n(n-1)(n-2)(n-3)}{1\times 2 \times 3 \times 4}\\ \\ \therefore \frac {n-4}{5} = 30 \implies n = 154$

Andy005 · Apr 15, 2017

Thanks

Is this correct? (1 Viewer)

Andy005

Member

Drongoski

Well-Known Member

Drongoski

Well-Known Member

Andy005

Member

Users Who Are Viewing This Thread (Users: 0, Guests: 1)