Question

what is the mean of multiples of 3 lying between 1 and 20

Answer 1

here is ur answer

no. of multiples lying between 1 and 20 are 6 ie. 3, 6, 9, 12, 15, 18

sum of these multiples = 63

mean = sum of multiples / no. of multiples

= 63 / 6

= 10.5

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Answer 2

YOUR ANSWER.....
Multiples of 3 lying between 1 and 20: 3,6,9,12,15,18
mean
=sum of multiples of 3 lying between 1 and 20/no. of multiples of 3 lying between 1 and 20
=(3+6+9+12+15+18)/6
=63/6
=10.5