Question

1. What is the value of 4P2?

6
8
12
24

Answer 1

Use:

\[\large ^nP_r = \frac{n!}{(n-r)!}\]

Answer 2

Here n = 4 and r = 2..

Answer 3

How??

Answer 4

What is \(4!\) ??

Answer 5

i cant figure it out

Answer 6

You will get;
\[\large ^4P_2 = \frac{4!}{2!} \implies \frac{4 \times 3 \times 2!}{2!}\]

After cancelling what are you left with?

Answer 7

12

Answer 8

Good..

Answer 9

so its 12?

Answer 10

how do i do this one > 10C6

Answer 11

\[\large ^nC_r = \frac{n!}{(n-r)! \cdot r!}\]

Answer 12

15?

Answer 13

Work more..

Answer 14

151,200?

Answer 15

Now work less.. :)