David purchases 10 pens for rs 150 and williams buys 7 pens for rs 84.can you say who got the pens cheaper?
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3
David bought 10 pens for 150, so he bought 1 pen for 150/10 = 15rs.
William bought 7 pens for 84, he bought 1 pen for 84/7 = 12rs.
So William got the pen cheaper.
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5
david purchase 10 pens for 150₹
wiliam purchase 7 pens for 84₹
∴ 1 pen = 150/10=15₹ (for david)
∴ 1 pen = 84/7 = 12₹ ( for wiliam )
∴ wiliam got the pens cheapier
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