Answer:
Step-by-step explanation:
3 coins pulled are 10 cents or more
5 coins are under 10 cents    
so 3 out of 8 coins are 10 cents or more     
the jar contains 200 coins
This is a ratio problem  3 is to 8  as  x (an unknown value) is to 200
3/8  = x/200       solve for x
times both sides by 200
200(3/8) = x                          solve directly here using a calculator
600/8  = x                             or keep similifying until you can divide more 
300/4  = x                              easily   I kept dividing the numerator and the 
150/2   = x                              denominator by 2 until i got 150/2 = 75
75 = x