Question

va rog ajutatima media aritmetica a numerelor a,b,c si media aritmetica a numerelor x,y este 7,2 caalculati media aritmetica a numerelor a,b,c,x,y

Answer 1

(a+b+c):3=7.2=> a+b+c=7.2×3=21.6
(x+y):2=7.2=> x+y=7.2×2=14.4

=>a+b+c+x+y=14.4+21.6=36
=>media aritmetica=(a+b+c+x+y):5=36:5=7.2