Question

arithmetic matic mean of 10 numbers is 20 and arithmetic mean of 13 numbers is 60 then arithmetic mean of the combined data​

Answer 1

Answer:

Arithmetic mean of combined data = 42.61 (approx)

Step-by-step explanation:

Average = Sum of observations / No. of observations

Sum of observations = Average * No. of observations

Mean of 10 numbers = 20

=> Sum of 10 numbers = 20*10 = 200

Mean of 13 numbers = 60

=> Sum of 13 numbers = 780

Sum of combined data (all 23 numbers) = 200 + 780 = 980

Mean of combined data = 980/23 = 42.61 (approx)