model 2 gain lost percentage Section-Wise Topic Notes With Detailed Explanation And Example Questions

Answer: (a)

Let the CP of 1 orange = Rs.1

SP of 10 oranges = Rs.13

Gain percent = ${13 - 10}/10 × 100$ = 30%

Using Rule 8,

Here, x = 13, y = 10

Profit % = $({x - y}/y) × 100$

= $({13 - 10}/10) × 100 = 300/10$ = 30%

Answer: (b)

S.P. of book = ${150 × 120}/100$ = Rs.180

S.P. = C.P.$({100 + \text"Profit%"}/100)$

= ${150 × (100 + 20)}/100$

= ${150 × 120}/100$ = Rs.180

Answer: (d)

Let the CP of each article be Rs.1

CP of 9 articles = Rs.9

SP of 9 articles = Rs.8

Loss = Rs.1; Loss % = $1/9$ × 100

Loss % = $100/9 = 11{1}/9%$

Using Rule 8,

Here, x = 8, y = 9

Loss % = $({y - x}/y) × 100$

= $({9 - 8}/9) × 100 = 100/9 = 11{1}/9%$

Answer: (b)

Let C.P. of each orange be Rs.1

Then, C.P. of 10 oranges = Rs.10

S.P. of 10 oranges = Rs.12

Gain % = $(2/10 × 100)$% = 20%

Using Rule 8,

Here, x = 12, y = 10

Profit % = $({x - y}/y) × 100$

= $({12 - 10}/10) × 100$ = 20%

Answer: (b)

Let C.P. of each article be Rs. 1

Then, C.P. of 7 articles = Rs. 7

S.P. of 7 articles = Rs. 10

Gain % = ${10 - 7}/7 × 100 = 300/7 = 42{6}/7%$

Using Rule 8,

Here, x = 10, y = 7

Profit % = $({x - y}/y) × 100$

= $({10 - 7}/7) × 100 = 300/7 = 42{6}/7%$