Question

cost of 4 pen is 7rs while the cost of 3 pen is 10rs how?

Answer 1

cost of 4 pens =₹7

cost of 1 pen =₹7/4

cost of 3 pens=₹7×3/4

cost of 3 pens=₹21/4

cost of 3 pens=₹5.25

hope this answer will help you.