Aspinner with three congruent sections is spun with the results as shown. what is p(1)?
1 3 3 2 1 2 1 1 3 3 2 1 1 1 2 2 2 3 3 1 3
a. 1/3
b. 8/21
c. 3/21
d. 3/7

Since the sections are congruent (exactly the same size and dimensions), this means that there is exactly a 1/3 chance for it to fall on 1, as long as some other factor doesn't interfere. 

Hope I helped!! xx

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm