Question 40: The average height of 22 toddlers increases by 2 inches when two of them leave this group. If the average height of these two toddlers is one-third the average height of the original 22, then the average height, in inches, of the remaining 20 toddlers is
30
28
32
26
Option: 3 Explanation:
Let the average height of 22 toddlers be 3x. Sum of the height of 22 toddlers = 66x Hence average height of the two toddlers who left the group = x Sum of the height of the remaining 20 toddlers = 66x - 2x = 64x Average height of the remaining 20 toddlers = 64x/20 = 3.2x Difference = 0.2x = 2 inches => x = 10 inches Hence average height of the remaining 20 toddlers = 3.2x = 32 inches