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There are some green, red and blue buttons in a box. 1/2 of the buttons are green and 1/3 of the buttons are blue. The difference between the number of green and red buttons is 20.

a)      What fraction of the buttons are red?

b)      How many buttons are there altogether?

 May 11, 2021
 #1
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1 - 1/2 - 1/3   =  1/6  of  the  buttons  are  red

 

Let  N  be  the total buttons  in the box....so.....

 

a)  (1/2)N  - (1/6)N  =  20

           (4/12)N  =  20

           (1/3)N  = 20              multiply  both sides  by 3

               N =  60

            (1/6)N  =  10  buttons  are red

 

b)  60  buttons

 

 

cool cool cool

 May 11, 2021

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