A, B, C are the sets of letters needed to spell the words STUDENT, PROGRESS and CONGRUENT, respectively. Then n (A È B Ç C) is equal to

A, B, C are the sets of letters needed to spell the words�

1.	A, B, C are the sets of letters needed to spell the words STUDENT, PROGRESS and CONGRUENT, respectively. Then n (A È B Ç C) is equal to
A.	8
B.	9
C.	10
D.	11
Answer» C. 10

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