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 ▸A right-angle triangle has three sides (diagram would be included). Side A = 3cm; Side B = 7cm. What is the length of Side C (the hypotenuse)? Give your answer to 2 d.p.
3kg of meat costs £54, Nina buys 2 kg of the meat. Work out how much Nina pays. (non-calculator)
How do I rationalise the denominator of √2+1]/√2-1?
How do I solve simultaneous equations using the substitution method?