Gross is defined as a dozen dozens. This means that 1 gross = 12 dozens = 12 x 12= 144
Solving the problem then:
Remaining bottles = 144 - (5 + 8 + 7) = 124
Note: The definitions of measurement terms, such as dozen
, are things you will need to know in order to do well on most any standardized math test. Be sure to review them by seeking online lists of "units of measurement" vocabulary.