Answer:
10
Step-by-step explanation:
Symbols in a deck :
{S, H, D, C}
Drawing two cards :
The possibilities of combination in the sample space :
_____ S ______ H ______ D ______ C
S ___ SS _____ SH _____ SD _____ SC
H ___ HS _____ HH ____ HD _____ HC
D ___ DS _____ DH ____ DD _____ DC
C ___ CS _____ CH ____ CD _____ CC
IF the order of selection does not matter, then we have :
{SS, SH, SD, SC, HH, HD, HC, DD, DC, CC}