Question

in a class of 15 students, 8 of them got 10 marks each, 4 students got 14 each and remaining 3 student got 20 each. so find the average mark of the class ​

Answer 1

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

total no of students is 15

8 got 10, 4 got 14,3 got 20.

so sum of observations is 8×10+4×14+3×20 = 80+56+60=196

average = sum of observations / total no of observations. = 196/15

$= {13}^{1/15}$

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