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Jennifer went to the market with 250 notes in her purse.
$50 notes made up 20% of the total number of notes.
The rest of the notes in the purse were $10 notes.
Jennifer used up some $10 notes for buying groceries.
There were now 35% less $10 notes than before.
(a) Find the number of $10 notes that Jennifer used.
(b) Find the total value of all the notes in Jennifer's purse in the end.
Notes to student: