Question

The total cost 95 pens and 89 notebooks is RS 7434.The total cost of 1 pen and 1 notebook is 81.What the cost of 1 notebook?

Answer 1

The cost of 1 note book = Rs 43.5

Explanation:

Given in question as :

95 pens (P) + 89 notebook (N) total cost = Rs 7434

1 pen (P) + 1 (N) total cost = Rs 81

So, from above equation

95 pens (P) + 89 notebook (N) total cost = Rs 7434

1 × 95 pen (P) + 1× 95 notebook (N) total cost = Rs 81 × 95

Or, (95 pens (P) + 95 notebook (N) ) - (95 pens (P) + 89 notebook (N) ) = (7695 - 7434)

Or , 6 N = Rs 261

Or, N =
`(261)/(6)` = Rs 43.5

Hence the cost of 1 notebook is Rs 43.5 Answer