An Easy Math Problem For Easy Points...?

red and blue - 26

red & not blue : 19

blue and not red : 17

i think thats right

14 + 12 + 5 = 31

so 2 students are wearing both

a) 14+12-2 = 24

b) 14-2 = 12

c) 12-2 = 10

Please note that alot of people will answer 26 for the first question, however this is incorrect:

29 - 5 = 24 (minus of people who arent wearing red OR blue

14+12 = 26 there is 26 blue and red colours but only 24 students this means 2 people must be wearing both colours

as I just mentioned there is only 24 people so how many red and blue = 24

red not blue = red people less the people who wearing both

blue not red = blue people less the people who wearing both

29

Red+Blue: 24 students

Red: 12 students

Blue: 12 students

Dunno... im in a rush just checking it out

let x be the first [smaller] of the two numbers and y be the second [larger] x + y = 140 y/x = 9/5 so y = 140 - x (140 - x)/x = 9/5 cross multiply 5(140 - x) = 9x 700 - 5x = 9x 700 = 14x x = 50 and since x + y = 140, y = 140 - 50 = 90

red and blue 2

only red 12

only blue 10

1. 26

2. 14

3. 12

1) 26

2)19

3) 19

26

14 or 19

12 or 17

red and blue- 2

red not blue- 12

blue not red- 10

none- 5

worked it out on paper.