Question

The average marks of 10 boys in a class is 70 and the average marks of 15 girls in the same class is 75. Find the average marks of the class​ ?
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Thanku Pallavi ¯\_(ツ)_/¯​

Answer 1

Answer:

Explanation:

Total marks of 10 boys = 70×10 = 1700

Total marks of 20 girls = = 17 ×15=  

Total marks of 50 students = 3700

Average = 370050 = 74

Answer 2

Answer:

72.5

Explanation:

Given:-

average marks of 10 boys in a class = 70

average marks of 15 girls = 75

To find :-

Average/ mean marks of the class

Solution:-

Average = SUM of observations / no. Of observations

=(70 +75) / 2

= 145/2

= 72.5

Hope it will help you