The conditional relative frequency table was generated using data that compares the number of boys and girls who pack their lunc
h or buy lunch from the cafeteria. 35 total girls and 50 total boys were surveyed. How many students bought their lunch from the cafeteria? Round to the nearest whole number.
There will be three pairs of matching sides: one pair 5x7, one pair 5x12 and one pair 12x7. We can compute the are of each side (in pairs) and then add up the total: