If the cost of 4 pens and 6 note books is ₹800, then find the cost of 6 pens and 9 note books.
Answer & explanation
Correct answer: option 2
The correct answer is Option 2: ₹1200
Given
4 pens + 6 notebooks = 800
4p + 6n = 800
Required
6 pens + 9 notebooks
6p + 9n = ?
Step
Notice that:
6p + 9n = 1.5 × (4p + 6n)
So,
1.5 × 800 = 1200