Urgent!!!!!!Dau coroana!!!!!!!
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Răspuns
Explicație pas cu pas:
a) regula de trei simpla ;
65____100%
13____ p = 13x100/65 = 20% ;
b) p = 24x100/96 = 25% ;
c) P = 9x100/72 = 12,5%
d) p = 21x100/140 = 15% ;
e) p = 12x100/300 = 4% ;
f) p = 52x100/800 = 6,5% ;