∵ MP of one dozen of pairs of socks = ₹ 80
∴ SP of one dozen of pairs of socks
=80 x (100 - 10)/100 = 80 x 90/100= ₹ 72

Correct Option: A

∵ MP of one dozen of pairs of socks = ₹ 80
∴ SP of one dozen of pairs of socks
=80 x (100 - 10)/100 = 80 x 90/100= ₹ 72

Hence, required number of pairs of socks
purchased for ₹ 24 = (12 x 24)/72 = 4

Here, r = 10% and R = 20%
∴ Required per cent = (r + R)/(100 - r) x 100 %
= [(10 + 20)/(100 - 10)] x 100% = (30 x 100)/90 %

This shows that the marked price of the item is 100/3 % more
than its cost price.

Correct Option: A

Here, r = 10% and R = 20%
∴ Required per cent = (r + R)/(100 - r) x 100 %
= [(10 + 20)/(100 - 10)] x 100% = (30 x 100)/90 %

This shows that the marked price of the item is 100/3 % more
than its cost price.

∴ Marked price of the article = (450 x 400)/300
= ₹ 600

Let cost price = ₹ 100
And marked price = 100 + 40 = ₹ 140
Let required discount be R %.

According to the question,
140 x (100 - R)/100 = 100

Correct Option: B

Let cost price = ₹ 100
And marked price = 100 + 40 = ₹ 140
Let required discount be R %.

According to the question,
140 x (100 - R)/100 = 100
⇒ 100 - R = (100 x 100) / 140
∴ R = 100 - (100 x 100) / 140
= (40 x 100) / 140
= 28.5 % (approx)

Let marked price = ₹ 100
And selling price = ₹ 80

In condition of 10% loss the cost price of article = (80 x 100)/90 = ₹ 800/9

Correct Option: A

Let marked price = ₹ 100
And selling price = ₹ 80

In condition of 10% loss the cost price of article = (80 x 100)/90 = ₹ 800/9

According to the question,
When SP = 95, then
∴ Required profit percentage = [{95 - (800/9)} / (800/9)] x 100 = 55/8
= 6.9% (approx)