The Greatest Card Trick in the world

I posted this because it relates to the card unit and probability unit in the maths dimensions book.

Pretty cool Card trick!

Mean

The mean is the average of a group of numbers altogether.

For eg.

1,4,6,3,7,9,

Add them together, so

= 30

Then divide it by the amout of numbers, in this case it is 6, so:

30/6 = 5

The average number is 5.

Pronumerals