The height of 10 girls were measured in cm and the results are as follows: 135,150,139,128,151,132,146,149,143,141
 What is the mean height of the girls? 
  • a)
    140.4 cm 
  • b)
    141.4 cm 
  • c)
    142.4 cm 
  • d)
    143.4 cm ​
Correct answer is option 'B'. Can you explain this answer?
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