Question

Three students from grades 10,11 and 12 were elected to the student council.
Grade 10: Tom(T), Sally(s) and Bill(B)
Grade 11: Jerry(J),Anne(A)and Connie(C)
Grade 12: Dan(D), Martha(M) and Gwen(G)

A three member committee is to be formed with one person from each grade. All possible combinations must be considered before a decision is made. Two possible combinatons are Tom, Jerry, and Dan (TJD) and Sally, Anne, and Martha (SAM). List all other possible combinations for the committee.

Answer 1

there are 27 such combinations.
Do you actually expect somebody to list those for you?
go about it systematically:
TJD
TJM
TJG
etc

Answer 2

tjd, tjm, tjg, tad, tam, tag, tcd, tcm, tcg, sjd, sjm, sjg, sad, sam, sag, scd, scm, scg, bjd, bjm, bjg, bad, bam, bag, bcd, bcm ,bcg

Answer 3

1)BCG
2)TJM
3)TJG
4)TAD
5)TAM
6)TAG
7)TCD
8)TCM
9)TCG
10)SJD
11)SJM
12)SJG
13)SAD
14)SAG
15)SCD
16)SCM
17)SCG
18)BJD
19)BJM
20)BJG
21)BAD
22)BAM
23)BAG
24)BCD
25)BCM

Answer 4

Thank you! This was correct.