M4maths Previous Puzzles

04 Jun 2009 rubbber and pencil

Total cost of 2 rubbers and 3 pencils is greater than 20 rupee whereas total cost of
3 rubbers and 2 pencils is less than 24 rupee. If cost of pencil is less then 7 rupee then
for what prize of rubber and pencil total cost of 4 rubbers and 5 pencils is minimum

OPtion

1) 5, 3
2) 2, 6
3) 3, 6
4) 4, 5
5) 5, 4
6) 1, 6
7) 2, 5
8) 3, 5
9) 3, 4
10) 4, 4

Solution

2x+3y > 20
3x+2y < 24
y < 7
We have to find a condition such that 4x+5y is minimum

Correct Option: 8 Best Solution (0)