Multiple choice

Girl students constitute $10\%$ of $1$ year and $5\%$ of II year of Roorkee University. During summer holidays $70\%$ of the I year and $30\%$ of II year students are given a project. The girls take turns on duty in canteen. The chance that $1$ year girl student is on duty in a randomly selected day is?

  1. $\dfrac{3}{17}$
  2. $\dfrac{14}{17}$
  3. $\dfrac{3}{10}$
  4. $\dfrac{7}{10}$
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A Correct answer