Problema Solution
How many ways are there of choosing 2 objects, without replacement, from the 3 objects pencil, eraser, and desk, if the order of the choices is relevant? the order of the choices is not relevant?
Answer provided by our tutors
Let
P = pencil
E = eraser
D = desk
If the order is not relevant the choices are:
PE
PD
ED
There are 3 choices if the order is not relevant.
If the order is relevant the choices are:
PE
EP
PD
DP
ED
DE
There are 6 choices if the order is relevant.