Răspuns :
20 elevi joaca fotbal
15 elevi joaca volei
25-15=10
20-10=10 elevi practica ambele sporturi
15 elevi joaca volei
25-15=10
20-10=10 elevi practica ambele sporturi
∅ Răspuns :
→ 20 + 15 - 25 =
→ 35 - 25 = 10 ( elevi practica ambele sporturi )
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→ 20 + 15 - 25 =
→ 35 - 25 = 10 ( elevi practica ambele sporturi )
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