Question

The average of a set of 4 numbers is 16 and the average of another set of 4 numbers is 20.Find the average of the 8 numbers taken together

Answer 1

Answer:

Average = 18

Step-by-step explanation:

Average = Sum of nos / No. of observations

For first 4 nos,

16 = Sum of nos / 4

16 x 4 = Sum of nos

64 = Sum of first four nos

For another 4 nos,

20 = Sum of nos / 4

20 x 4 = Sum of nos.

80 = Sum of nos

Average of all nos. = Sum of all nos. / 8

Average = Sum of first four nos + Sum of another 4 nos / 8

Average = 64 + 80 / 8

Average = 144 / 8

Average = 18