Jonathan, Matthew and Zac are picking strawberries from their yard. Together they have picked a total of 550 strawberries. Jonathan and Matthew have picked 350 strawberries together. Matthew and Zac have picked 250 strawberries together. How many strawberries has Zac picked by himself?	Options.
A) 100	B) 200	C) 350	D) 50	E) 250
Jonathan = Matthew + Zac = 550 strawberries   J + M = 350   M + Z = 250   Use J + M = 350 to plug into the original formula   (J + M) + Z = 550   350 + Z = 550   Subtract 350 from each side   Z = 200   Answer: 200
<result>B</result>
Jonathan, Matthew and Zac are picking strawberries from their yard. Together they have picked a total of 550 strawberries. Jonathan and Matthew have picked 350 strawberries together. Matthew and Zac have picked 250 strawberries together. How many strawberries has Zac picked by himself?