Question

Aflati media aritmetica a zece numere rationale, stiind ca media aritmetica a primelor 2 numere este 5, media aritmetica a hrmatoarelor trei numere 25, iar media aritmedtica a ultimelor cinci numere este 200

Answer 1

ma1=(a+b)/2
=5
a+b=2*5=
10
ma2=(c+d+e)/3
=25
c+d+e=3*25
=75
ma3=(f+g+h+i+j)/5
= 200
f+g+h+i+j=5*200
=1000
ma=(a+b+c+d+e+f+g+h+i+j)/1
= (10+75+1000)/10
= 1085/10
=108,5

Answer 2

(a+b)/2=5→a+b=5·2=10
(c+d+e)/3=25→ c+d+e=25·3=75
(f+g+h+i+j)/5=200 → f+g+h+i+j=200·5=1000

Ma=(a+b+c+d+e+f+g+h+i+j)/10= (10+75+1000)/10=1085/10=108,5