in a group of 70 people , 60 like swimming , 50 like wrestling . how many like both swimming and wrestling ?
"make a venn diagram , and enter your data . let the number of people who like both swimming and wrestling be x 60 - x + x + 50 - x = 70 x = 40 so number who like both swimming and wrestling = 40 answer c"
add(add(50, subtract(60, 50)), 50)