The cost of 20 pens and 12 pencils is Rs.400 and the cost of 6 pens and 4 pencils is Rs.100. Find the cost of each pen? Select: A) Rs.50 B) Rs.100 C) Rs.150 D) Rs.25 E) Rs.125
20p + 12q = 400 --- (1)   6p + 4q = 100   8p + 8q = 192 --- (2)   (1) - (2) =&gt; 8p = 160   =&gt; p = 50   Rs.50NSWER:Rs.50
<result>A</result>
The cost of 20 pens and 12 pencils is Rs.400 and the cost of 6 pens and 4 pencils is Rs.100. Find the cost of each pen?