Using 3 Ts and 2 Js , in how many different orders can the five letters be arranged? For example, TTTJJ and TTJJT are two such different orders.
A.
2
B.
10
C.
20
D.
60
Exam No：2018 First Round Grade 4 Year：2018 Question No：24
Answer:
B
Knowledge points:
G4 - Number Sense - Systematic Counting
Solution:
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