Question

if the average of 7 numbers is 5 and 5 numbers is 7 then what is the average of 12 numbers

Answer 1

Answer:

average=(sum of data)/no of data

sum of numbers= average× no of numbers

sum of 7 numbers= 5×7=35

sum of 5 numbers=7×5=35

total sum of numbers=35+35=70

total no of numbers=7+5=12

average of 12 numbers= 70/12=35/6