Respuesta :

Answer:

  • 50-60 series

Step-by-step explanation:

Median lies in the series with the middle frequency.

Total number of frequencies:

  • 16 + 36 + 61 + 77 + 80 = 270

The middle frequency is between the 270/2 = 135 and 136.

This falls in the series 50 - 60 with 77 frequencies.

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