Respuesta :

Step-by-step explanation:

[tex] \underline {\underline{ \text{Given}}} : [/tex]

  • Cost of one dozen of note books ( 12 note books ) = Rs 252

[tex] \underline{ \underline{ \text{To \: find}}} : [/tex]

  • Cost of 10 note books

[tex] \underline{ \underline{ \text{Solution}}} : [/tex]

Finding the cost of 1 note book :

⟼ [tex] \tt{ \frac{252}{12} = Rs 21}[/tex]

Finding the cost of 10 note books :

⟼ [tex] \tt{21 \times 10 = Rs 210}[/tex]

[tex] \pink{ \boxed{ \boxed{ \tt{Our \: final \: answer : \boxed{ \underline{ \tt{Rs 210}}}}}}}[/tex]

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Answer:

Rs. 210

Step-by-step explanation:

If 12 notebooks (or a dozen) cost 252,

then one notebook will cost 252/12 = 21 rupees.

If one notebook costs 21 rupees, then 10 notebooks will cost 21*10 ruppes, or 210 rupees.