Question 482529
Place the "all three" of 12
then: 18-12=6  21-12 = 9   17-12 = 5
then: 69 -6-12-9=42, 25-6-12-2=6 and 30-9-12-2=7 to complete
{{{drawing(300,300,-5,4,-5,4,
rectangle(-4,-4,4,4), locate(-2,1.8,42),locate(1.5,1.9,5),
locate(-3.7,-1,12),
 locate(-3.5,2.5,T), locate(-.1,2,6),
circle(-sqrt(2),sqrt(2),2),locate(3.5,2.5,C),
circle(sqrt(2),sqrt(2),2),
circle(0,-.5,2),
locate(-.1,-1.1,7), 
locate(-.1,1,12),
locate(-1.1,.7,9),
locate(1,.6,2),locate(1.9,-1.1,Z)
)}}}
(a) How many grew only tomatoes? 42
(b) How many grew both tomatoes and zucchini, but not cucumbers? 9
(c) How many grew only zucchini? 7
(d) How many grew none of these three or only cucumbers? 12+5 = 17
(e) How many vegetable gardeners were surveyed? 42+12+6+9+5+2+7+12 = 95

m.ananth@hotmail.ca