She made 10 x 2 = <<10*2=20>>20 bonnets on Tuesday and Wednesday.
While on Thursday she made 10 + 5 = <<10+5=15>>15 bonnets.
On Friday she made 15 - 5 = <<15-5=10>>10 bonnets.
Mrs. Young made a total of 10 + 20 + 15 + 10 = <<10+20+15+10=55>>55 bonnets for the orphanage.
Therefore, Mrs. Young sends 55 / 5 = <<55/5=11>>11 bonnets to each orphanage.
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