Question

m.a a ,b, c si d este 8
calculati m.a. a primelor doua nr. stiind ca m.a. a ultimelor doua este 6

Answer 1

a+b+c+d /4 =8  ;  c+d/2 =6
a+b/2+c+d/2 =8

a+b/2 +6 =8
a+b/2 =8-6
a+b/2 =2

Answer 2

(a+b+c+d):4=8 => a+b+c+d=8×4=32
=> stim ca (c+d):2=6 => c+d=6×2=12 => a+b=32-12=20 => m.a= 20:2=10