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Algebra Difficulty 1.0 Junior Find the answer United Kingdom

The mean age of the members of a jazz band is 21. The saxophonist, singer and trumpeter are 19, 20 and 21 years old respectively. The other three musicians are all the same age. How old are they?

(A) $21$ (B) $22$ (C) $23$ (D) $24$ (E) $26$

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