Page 110 - Fixtures

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30 1

10
A = {3k : 1 ≤ k ≤ 10}
B = {3k + 1 : 0 ≤ k ≤ 9}
C = {3k + 2 : 0 ≤ k ≤ 9}

3

.

3C(10, 3)

.10 ×10 ×10 = 103

. 3C(10, 3) + 1000 = 3 ×10! + 1000 = 360 + 1000 = 1360

3! × 7 !

()

ASCENDENCE

()

CNE

. 10! = 151200
3! ×2! ×2! ×1! ×1! ×1!

(AHSME 1993) ( )

4×4