Question

1)intr o clasa sunt 30de elevidintre care 40%sunt fete .Cate fete si cati baieti sunt in clasa?
2)Intr o livada sunt 120 de pomi .30%dintre ei sunt pruni ,50%dintre ei sunt meri,iar restul sunt ciresi.Cati pomi de fiecare tip sunt in livada??
3)Calculati media aritmerica a numerelor
○a)4si8,10si50,25si45,12si18
▶b)2,5si8;17,13si24;200,300si400
va rog sa ma ajutati ★☆

Answer 1

1)
$fete= \frac{40}{100} *30=12$
$baieti=30-12=18$
2)
$pruni= \frac{30}{100} *120=36$
$meri= \frac{50}{100} *120=60$
$ciresi= 120-36-60=24$
3)
a)
$m_a= \frac{4+8}{2} = \frac{12}{2} =6$
$m_a= \frac{10+50}{2} = \frac{60}{2}=30$
$m_a= \frac{25+45}{2}= \frac{70}{2} =35$
$m_a= \frac{12+18}{2}= \frac{30}{2} =15$
b)
[tex]m_a= \frac{2+5+8}{3} = \frac{15}{3} =5 [/tex]
$m_a= \frac{17+13+24}{3} = \frac{54}{3} =18$
$m_a= \frac{200+300+400}{3} = \frac{900}{3} =300$