Numberofcombinationsof objectsoftwo types Thenumberofdiﬀerentwaysofordering x objects of onetypeand n − x objects of asecond type in asequence of n objects is given by ! n x - = n! x!(n−x)! . (2) This formulaholdsfor anyinteger valueofxfrom 0ton.The number ' n x , is read ‘n choose x’.Alternative notation for ' n x , is n C x ,sometimes read as ‘n c x’ The number x!isread‘xfactorial’. Forany positiveinteger x,the notation x!isshorthand forthe number 1 × 2 × 3 ×···×x.The number 0! is deﬁnedtobe1
If you want to change selection, open document below and click on "Move attachment"
owner: Gavin - (no access) - m248_unit03_e2i1.pdf, p12
last reprioritisation on
suggested re-reading day
started reading on
finished reading on
Do you want to join discussion? Click here to log in or create user.