Answers

1. From the give information, 15/28 of the writing utensils are black pens

   Fractions

   From the question, we are to determine what fraction of the writing utensils are black pens

   From the give information,

   5/7 of the writing utensils are pens

   and

   3/4 of the pens are black pens

   ∴ 3/4 of 5/7 of the writing utensils are black pens

   3/4 of 5/7 = 15/28

   Hence, 15/28 of the writing utensils are black pens

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