The selling price of 4 pen is equal to the cost price of 5 apples what is the profit or loss percent

National Mineral Development Corporation (NMDC) has released a new notification for the NMDC Maintenance Assistant Recruitment 2022. A total of 125 vacancies have been released for the Maintenance Assistant post. Candidates can apply for the applications from 3rd February 2022 to 2nd March 2022. The selection of the candidates depends on two stages, which are the Written Test and Trade Test. The selected candidates will for the Maintenance Assistant get an NMDC Maintenance Assistant Salary of Rs. 18,000 to Rs. 31,850.

The selling price of 4 pen is equal to the cost price of 5 apples what is the profit or loss percent

The selling price of 4 pen is equal to the cost price of 5 apples what is the profit or loss percent
Prev

Question 10 Percentage Exercise 7.2

Next

The selling price of 4 pen is equal to the cost price of 5 apples what is the profit or loss percent

Answer:

Consider ₹ x as the C.P. of 7 pens

C.P. of 1 pen = ₹ x/7

Based on the question

S.P. of 5 pens = ₹ x

S.P. of 1 pen = ₹ x/5

Profit = S.P. – C.P.

Substituting the values

= x/7 – x/5

Taking LCM

= (7x – 5x)/ 35

= ₹ 2x/ 35

We know that

Profit % = Profit/C.P. × 100 %

Substituting the values

= 2x/ 35/ x/7 × 100 %

It can be written as

= 2x/35 × 7/x × 100 %

By further calculation

= 2/5 × 100 %

So we get

= 2 × 20 %

= 40 %

Video transcript

hello everybody welcome to lido learning channel my name is rajna chaudhary and we have to solve the question it is a shopkeeper buys a certain number of pens if the selling price of five pens is equal to the cost price of seven pens then find the profit or loss percent so uh we do not know either cost price or selling price so what we can do is we can let it but how to let is we will let the x as the cost price of seven pens right so we are letting cost price of seven price uh seven pence so let's let it let x is cp of seven pens now because x is the cost price of seven pens we can also find the cost price of one pen so cost price of one pen would be x upon now we also have to find selling price because cost price of seven pen is also equal to the selling price of five pen so x is also selling price of five pen so here i'm writing that selling price of five pen is also equal to x so selling price of one pen would be x upon five we are calculating the selling price and cost price of one pen because uh we we do not know the exactly number how many total pens were bought or sold so let's do it by calculating one now substituting the values and finding the profit uh so because why are we saying that it is profit because we can clearly say that cost price is greater than the selling price so that is a profit so let's find the profit so profit is selling price minus cost price that is x upon 7 minus x upon 5 after simplification we have 2 x upon 35 so this is the profit in rupees but we have to find profit percent so profit percent would be profit upon cp multiply by 100 now profit we know in rupees it is given that 2x upon 35 we have to put a hundred in the uh we have to put cost price in the denominator so cost price of a cost price of one pen that is x upon 7 multiplied by 100 and a percent sign after calculation we can write it like 2x upon 35 multiplied by 7 upon x x is cancelled out here 35 is also cancelled out by 7 5 times and we also have 100 and percent side now uh this 5 can cancel out this 100 it is 20 times now we are left with 2 and 20 in numerator so they would multiply together and we would get answer as 40 percent so here profit percent is 40. so i hope you understand this method how to calculate the profit person when any selling price of any item some item is equal to the cost price or some other i some other number of same items so see you in my next video don't forget to like share and subscribe channel thank you for watching

The selling price of 4 pen is equal to the cost price of 5 apples what is the profit or loss percent
The selling price of 4 pen is equal to the cost price of 5 apples what is the profit or loss percent