Respuesta :

Answer:

95

Step-by-step explanation:

let x be his mark in the fourth test, then

mean = [tex]\frac{83+81+73+x}{4}[/tex] = 83 ( multiply both sides by 4 )

83 + 81 + 73 + x = 332

237 + x = 332 ( subtract 237 from both sides )

x = 95


Otras preguntas