Ma ajutati va rog la acest exercițiu va rog dau coroana
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a)2+4+6+4+2+4+2+1=25 (elevi)
b)2+4+2+1=9
c)(2×3+4×4+5×6+6×4+7×2+8×4+9×2+ 10×1)/25=(6+16+30+24+14+32+18+10) /25=150/25=6
d) 25elevi..............100%
19elevi..............? %
19×100/25=76%
Coroana?