Jenny is planning an extended trip to Russia.The table below shows a list of cities which she would like to visit during her stay, along with the amount of money she anticipates needing to spend on travel, lodging, and similar expenses in each city. All costs are given in Russian rubles (RUB).
 City
 Cost (RUB)
 Izhevsk
 4,721
 Novosibirsk
 4,870
 Nizhny Novgorod
 6,920
 Moscow
 5,485
 Chelyabinsk
 5,217
 Saint Petersburg
 5,960
 Tolyatti
 5,598
 Yaroslavl
 4,901
 Even though Jenny wants to go to each of these cities, her budget is only RUB 33,000, so she recognizes that she must change her itinerary and choose not to visit some cities. Which of the following pairs of cities will not put Jenny back under budget if she drops them?
 a.
 Moscow and Chelyabinsk
 b.
 Izhevsk and Nizhny Novgorod
 c.
 Novosibirsk and Saint Petersburg
 d.
 Yaroslavl and Tolyatti
 THE ANSWER IS D. YAROSLAVI AND TOLYATTI 
 EXPLANATION: the total of all cities is 43,672. If we subtract 4901 for Yaroslavi and 5598 for Tolyatti we have 33,173 (43,672 - 4901 - 5598 = 33,173). This would still be over Jenny's budget