Question

There are 20 children on a play ground. 13 played kick ball and 15 played soccer and 2 did not play either sport. How many children played both kick ball and soccer?

Answer 1

A)5
B)7
C)9
D)10
E)13

Answer 2

S+B = 15
K+B = 13
S+B+K+N = 20

Answer 3

N=2 => S+B+K = 18

so a system with 3 equations and 3 unknowns

Answer 4

would it work out the same if you just said 18 students...and just left off the 2 that didn't play either ??

Answer 5

hold on i'll try to work on it

Answer 6

is it 10?

Answer 7

is it?

Answer 8

I am not 100% sure...but that is what I am getting

Answer 9

tell me don't ask

Answer 10

I'll show my work.

Answer 11

love it