Simplify 3!/5!
We call 3! 'three factorial' and 5! 'five factorial'.
3!=3x2x1
5!=5x4x3x2x1
So our fraction becomes:
(3x2x1) / (5x4x3x2x1) = 6/120
Then dividing the top and bottom by 6 we get:
1/20
ME
Related Maths GCSE answers
All answers ▸How do I solve two simultaneous equations?
Factorise and solve x^2 -8x=15=0
Kieran, Jermaine and Chris play football. Kieran has scored 8 more goals than Chris. Jermaine has scored 5 more goals than Kieran. Altogether they have scored 72 goals. How many goals did Jermaine score?
Find the opposite length of the triangle with hypotenuse length 5 and adjacent length 4.