College of Admission Tests Multan

Algebra

Solve the question of and select the option from the choices A through D/E. Check your Answer and view the explanation.

Question: 9

Jamal has a total of Rs. 29 in 5-rupee and 2-rupee denominations. The number of 5-rupee notes is one-half of one less than the number of 2-rupee notes. How many 5-rupee notes and 2-rupee notes does Jamal has respectively?
  • 7, 3
  • 3, 7
  • 2, 5
  • 5, 2

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Correct Answer: B

not available

Let x be the 5-rupee notes and y be the number of 2-rupee notes.
5x+2y=29-------- (i)
x=(y−1)/2
2x−y=−1-------- (ii)
On solving both the equation we get: x=3 and y=7