Question

va rog dau coroana media aritmetica ponderata​

Answer 1

media aritmetică=2•4+3•5+3•6+4•7+5•8+6•9+2•10/25

=8+15+18+28+40+54+20/25=183/25=7,32

media ponderată=2•4+3•5+3•6+4•7+5•8+6•9+2•10/2+3+3+4+5+6+2=

=183/2+6+4+11+2=183/8+15+2=183/23+2=183/25=7,32

media ponderată=p1•x1+p2•x2+...+pn•xn/p1+p2+...+pn

x1, x2, x3, xn--->nota

p1, p2, p3, pn--->numărul elevilor care au obținut nota

media aritmetică:(a+b) /2

(a+b+c) /3