The marks obtained by students in a maths test out of 20 are given below .Find the mean. 9 , 8, 11, 12, 5, 4, 3,15, 17, 18, 8, 12, 4, 3, 18, 14, 16, 8, 18, 17 with formula
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marks obtained by student in maths test out of 20
formula of mean = sum of values all the observations / number of observations .
so according to formula
9+8+11+12+5+4+3+15+17+18+8+12+4+3+18+14+16+8+18+17/20
220/20
ans= 220/20
= 11✓✓ ans
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