Bayle L.
asked • 04/23/19
how many 3-letter codes can be formed by using letters ABCD and E? no letter can be used more than once
Carolyn S.
answered • 05/13/19
Patient and Effective Elementary Teacher
There are 57 possibilities
ABC
ABD
ABE
ACB
ACD
ACE
ADB
ADC
ADE
BAC
BAD
BAE
BCA
BCD
BCE
BDA
BDC
BDE
BEA
BEC
BED
CAB
CAD
CAE
CBA
CBD
CBE
CDA
CDB
CDE
CEA
CEB
CED
DAB
DAC
DAE
DBA
DBC
DBE
DCA
DCB
DCE
DEA
DEB
DEC
EAB
EAC
EAD
EBA
EBC
EBD
ECA
ECB
ECD
EDA
EDB
EDC
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Jed K.
Why would it not be 60? ₅P₃=60 Right?05/28/20