PS Problem of GMAT Prep test Based on Range

[mail2nikhil01]

Hi
Please help me to solve this question.It's Gmat prep Test question based on Range

[fleshins]

Range of a set of #s = highest # - lowest #

Range before changes = 112 - 45 = 67
Range after changes = 118 - 36 = 82

Difference between ranges = 82 - 67 = 15