Free GMAT Practice Question

Five members of a community garden club each logged some number of volunteer hours last month. Three of them logged 4 hours, 7 hours, and 20 hours. The remaining two members are Nadia and Omar, and Omar logged more hours than Nadia. For the five members, the mean number of hours logged is 11 and the median is 10.

In the table, select the number of hours Nadia logged and the number of hours Omar logged. Make only two selections, one in each column.