Respuesta :

mhanifa

Answer:

  • 14.3 years

Step-by-step explanation:

The average age of 18 girls is 12.

Total age of girls:

  • 18*12 = 216

The average age of 15 boys is 17

Total age of boys:

  • 15*17 = 255

Total age of children:

  • 216 + 255  = 471

Total number of children:

  • 18 + 15 = 33

Average age of children:

  • 471 / 33 = 14.3 (rounded)

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