The average of 5 quantities is 6. The average of 3 of them is 4. What is the average of remaining 2 numbers?

average=Sum of observation/no of observation6= sum of observation/5so sum of observation= 30so sum of three + sum of two observation= 30so (4*3)+sum of two observation= 30sum of two observation= 30-12=18so it's average= 18/2= 9so 9 is answer