Question

The A.M. of ten numbers is 10, A.M. of 15 numbers is 10, A.M. of combined data is?

Answer 1

Step-by-step explanation:

let the sum of 10 numbers be x

then Arithmetic mean= x/10 = 10

x=100

let the sum of 15 numbers be y

then, arithmetic mean = y/15 = 10

y=15

combined arithmetic mean= x+y/10+15

=100+150/25

=250/25

=10

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