A, b, c are circular regions as shown below. there are 7 items in c and there are 20 items in a but 10 of those items are not in b. how many items are in b that are not in c

3 items are in B that are not in C

Step-by-step explanation:

a: only in a, not count those in b or c

b: only in b, not count those in a or c

c: only in c, not count those in a or b

A = a + b + c = 20

c = 7

a + b = 20 - 7 = 13

10 not in b, of course not in c ∴ a = 10

b = 13 -10 = 3

answer: .75 km

step-by-step explanation:

i believe the correct answer is b.