867 - elevi total
243 - elevi cls II
301 - elevi cls III
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a) 243 + 301 = 544 (elevi de clasa a II si a III au participat la concurs)
b) 867 Elevi totali
Elevi clasa a IV a = 867 - 544
= 323
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Sper ca te-am ajutat ! Coroana ?