Test Prep GMAT-Test

There are 40 students in a classroom, 9/20 of them are boys and 4/5 of them are right-handed. How many right-handed boys are there in the classroom? 

Two cars are traveling on the same road towards each other. If car A is traveling at a speed of 120 km/h and car B is traveling 15% slower, how much time will it take the cars to meet if the initial distance between the two is 668.4 km and car A started to drive one hour and a half before car B started? 

Fire ants have invaded much of the southern United States and, as a result, horned lizards have disappeared in invaded areas, because the fire ants, which sting aggressively, kill the young lizards and eliminate the harvester ants that are the lizards’ primary food. Populations of horned lizards have declined even in those southern localities that as yet remain free of fire ants, but ecologists believe that decline is also attributable to the southern states’ invasion by fire ants? Which of the following, if true, provides the strongest justification for the ecologists’ belief?

Some supermarket retailers offer “everyday low prices” across a wide assortment of product categories, while others offer temporary deep discounts in a smaller group of categories. The former strategy is commonly known as “EDLP”, the latter as “HILO”. One question that arises is whether these different pricing formats are more or less attractive to different types of shoppers. Shoppers can be defined (in a relative sense) as either large- or small-basket shoppers: large-basket shoppers shop less frequently and purchase across many more product categories on a single visit than do small-basket shoppers. Thus, large-basket shoppers are likely to be more captive to prices across many categories and have less flexibility to take advantage of occasional price discounts. Bell and Lattin predict that, in comparison to small-basket shoppers, large-basket shoppers will be less influenced by the expected price of an entire basket of goods – which these shoppers presume to be lower at an EDLP store. Meanwhile, small-basket shoppers, who shop more frequently and thus have more flexibility, can often defer purchases of items when the items are priced high, because the shoppers know they will soon return to the store. Bell and Lattin speculate that a supermarket whose format offers greater variability in price might thus tend to attract small-basket shoppers. The passage suggests that shoppers at a HILO supermarket will benefit most from that store’s pricing strategy if the