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There are 70 cookies in a box. The number of raisin cookies was 1/4 the number of plain cookies. Josephine ate 3 raisin cookies and 3 plain cookies. Find the difference between the number of raisin and plain cookies in the box in the end.

 Apr 19, 2021
 #1
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Number of raisin cookies  originally   =   1 / ( 1 + 4)  * 70     =  (1/5) 70  = 14

 

Number of plain  =  70 -14  = 56

 

So

 

(56 - 3)  - (14  - 3)  =

 

53   -   11    =

 

42

 

Notice  that this is the   same difference as   56  -14

 

cool cool cool

 Apr 19, 2021

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