Question

average of 4 boys are 70kg.the weight of three boys are 71 kg ,83kg,58kg .what is the weight of 4 th boy​

Answer 1

Step-by-step explanation:

average =70

X=71

Y=83

Z=58

A=?

Average =(A+X+Y+Z)/4

70 =71+83+58+A/4

70 =212+A/4

28=212+A

A = 212-28

A=184