Question

Ankit buys 10 notebooks and 10 pens . If the cost of 1 notebook is Rs 7 and 1
pen is Rs 5. How much money does he spend. ? Mention the property you used to
find the answer.

Answer 1

Answer:

Let number of notebooks purchased = x

and number of pens purchased =y.

Acordingly:-

13 x + 11 y = 1000

y = (1000–13.x)/11

on putting x= 5 , y =(1000–65)/11=935/11 = 85.

In (1000–13x)/11 , there is 11 in Dr.

Next value of x = 1st value of x +multiple of 11.

= 5 +11 =16

On putting x= 16 , y =(1000–208)/11=792/11= 72.

Now putting x=16+ 11=27 , y=(1000–351)/11

=649/11=59.

Putting x=38. y=(1000–494)/11=506/11=46

Putting x=49 , y=(1000–637)/11=363/11=33

Putting x= 60 , y=(1000–780)/11=220/11=20

Putting x= 71 , y=(1000–923)/11=77/11 = 7.

Thus

No.of n/books (x) and No. of pens (y) are :-

(5,85) , (16,72) , (27,59) , (38,46) , (49,33) ,

(60,20) and (71,7) . Answer.

1.6K viewsView 7 Upvoters · Answer requested by Tuhin Mitra

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Step-by-step explanation:

Answer 2

Answer:

He spent Rs.$120$ in total.

Step-by-step explanation:

It is given that Ankit buys ten notebooks and ten pens.

Cost of one notebook is Rs.$7$

Cost of one one is Rs.$5$

We need to determine total money to be spent.

Total money spent on notebook $=10*7$

$=70$

He spent Rs.$70$ on notebooks.

Total money spent on pen $=10*5$

$=50$

He spent Rs.$50$ on notebooks.

Total money spent is Rs.$70+50=120$

He spent Rs.$120$ in total.

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