If the average cost of 5 pens and 4 pencils is 36.and average cost price of 5 pens and 9 pencils is 56..find out the total cost of 25 pens and 25 pencils
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5 pens + 4 pencils = 36
5 pens +9 pencils=56
cost of 5 pens = 56-36
= 20
1 pen = 4
if 1 pen =4
1 pencil =
4*5 pens + 4 pencils =36
20+4 pencils =36
1 pencil= 4
25 pens = 100
25 pencils = 100
5 pens +9 pencils=56
cost of 5 pens = 56-36
= 20
1 pen = 4
if 1 pen =4
1 pencil =
4*5 pens + 4 pencils =36
20+4 pencils =36
1 pencil= 4
25 pens = 100
25 pencils = 100
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