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| revprev | Admin | Jul 3'24 at 13:04 | +22 | m | |
| revcurprev | Admin | May 7'23 at 12:07 | −1 | m | |
| revcur | Admin | (Created page with "'''Solution: E''' Let X and Y denote the annual cost of maintaining and repairing a car before and after the 20% tax, respectively. Then Y = 1.2X and Var[Y] = Var[1.2X] = (1....") | May 7'23 at 12:05 | +234 |