Avg cost of 6 pencils and 8 pens is Rs. 70.The avg cost of 8 pencils and 10 pens is Rs.90. Find the total cost of 25 pencils and 25 pens?
Choose the correct choice from the following.
A) 100 B) 125 C) 130 D) 80 E) 90
Avg cost of 6 pencils and 8 pens is Rs. 70   (6 pencil + 8 pens) 14=70   therefore 1 pencil cost is  70/14= 
<gadget id="calculator"> 70/14</gadget>
<output>5</output>
5, so 6 pencil cost is 6x5=30 and 8 pens cost is 8x5=40   Again, avg cost of 8 pencils and 10 pens is Rs.90   (8 pencil + 10 pens) 18=90   therefore 1 pencil cost is  90/18= 
<gadget id="calculator"> 90/18</gadget>
<output>5</output>
5, so 8 pencil cost is 8x5=40 and 10 pens cost is 10x5=50   So 25 pencil cost is (25/a)=125 and 25 pens cost is (25x5)=125   ANSWER:125
<result>B</result>
Avg cost of 6 pencils and 8 pens is Rs. 70.The avg cost of 8 pencils and 10 pens is Rs.90. Find the total cost of 25 pencils and 25 pens?