Question

va rog repede!!!!!!! Media aridmetica a nr. a si b este 15. M a. a nr. c si d este 39: determinati: a) suma nr. a si b b) m a . a nr a b c d.

Answer 1

(a+b)/2=15 => a+b=30. (C+d)/2=39 => c+d=78 ma=(a+b+c+d)/4=(30+78)/4=108/4=27

Answer 2

a+b/2=15=>a+b=30
c+d/2=39=>c+d=78
a+b+c+d/4=30+78/4=108/4=27