Question

seventy five ball pens cost Rs 637.50. Find the price of 23 ball pens . How many pens can be bought for Rs.800 and how much money will be left?​

Answer 1

Answer:

Price of 23 Ball Pens- Rs. 195.5

No. of Pens that can be bought in Rs.800- 94 Pens

Money Left after buying 94 Pens- Rs. 2

Step-by-step explanation:

Cost of 75 Pens = Rs.637.5

Cost of 1 Pen =  $\frac{637.5}{75}$= Rs. 8.5

Cost of 23 Pens= Rs. 8.5 ×23 = Rs.195.5

Next part of the solution ,

Number of pens to be bought in Rs.8.5 = 1

Number of pens to be bought in Rs. 800= $\frac{800}{8.5\\}$= $\frac{1600}{17\\\\}$=94$\frac{2}{17}$

The quotient 94 is the number of pens that can be purchased and the remainder 2 is the amount left after purchasing them.

Answer 2

Given data : Seventy five ball pens cost Rs 637.50. Find the price of 23 ball pens .

To find : How many pens can be bought for Rs 800 and how much money will be left ?

Solution : a/c to question;

• cost of 75 ball pens = Rs 637.50
• price of 23 ball pens = ?

Firstly we have to find out cost of one ball pens

⟹ cost one pen = cost of 75 ball pens/75

⟹ cost one pen = 637.50/75

⟹ cost one pen = Rs 8.5

Now,

⟹ cost of 23 ball pens = cost one pen * 23

⟹ cost of 23 ball pens = 8.5 * 23

⟹ cost of 23 ball pens = Rs 195.5

Now,

⟹ Ball pens bought for Rs 800 = 800/8.5

= 94.11764706 pens

Hence, 94 bought for Rs 800.

Answer : Hence the cost of 23 ball pens is Rs 195.5 and 94.11764706 ball pens were bought for Rs 800 and there is no money left.

More info :

{Now, we need to find out cost of 0.11764706 pen/pens

cost of 0.11764706 pen/pens = 0.11764706 * 8.5 = Rs 1.00000001

Hence, cost of 94 pens = 800 - 1.00000001 = Rs 799}

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