Question

A shopkeeper earns a profit of Rs.2 by selling a pen and incurs a loss of 50 paise

per pencil and loss of 15 paise per eraser while selling pencils and eraser of old

stock. On a particular day, he earns a profit of Rs.10. He sold 10 pens and the

number of pencils and erasers he sold are in the ratio 7:10.

(a) How will you denote the profit and loss amount?

(b) Find the number of pencils and erasers he sold on that day.

(c) If he is selling on one day 30 pens, 45 pencils and 20 erasers, then what will be his total

earning on tha​

Answer 1

Answer:

(a) How will you denote the profit and loss amount?

Answer 2

Answer:

Number of pencils = 7 x 2 =14. Number of erasers = 10 x 2 = 20.

Step-by-step explanation:

By selling a pen gain is Rs.2

and by selling a pencils, he loses 50 paise

and an eraser, he loses 15 paise

On one day, he gain =Rs.10

On that day he sold 10 pens and pencils and erasers in the ratio of 7:10

On ten pens, his gain =10×2=Rs.20

loss on pencils and erasers =Rs.20−Rs.10=Rs.10=1000 paise

Ratio in pencil and eraser =7:10

Let number of pencils =7x, then eraser =10x

7x×50+10x×15=1000

⇒350x+150x=1000

⇒500x=1000

⇒x=2

Numbe rof penciles =7×2=14

and number of erasers =10×2=20