Arjun spent Rs.12 to purchase some pens and pencils.The cost of a pen and pencil are in the ratio 3:2.
the total cost of a pen and a pencil is Rs. 3.
if the total number of pens and pencils he purchased is7,
find the number of pens he purchased.

Question

Arjun spent Rs.12 to purchase some pens and pencils.The cost of a pen and pencil are in the ratio 3:2.
the total cost of a pen and a pencil is Rs. 3.
 if the total number of pens and pencils he purchased is7, 
find the number of pens he purchased.

anonymous · Answer

@AravindG

shubhamsrg · Answer

What was your attempt ? Did you try ?

aravindg · Answer

ya this one is too easy ..can u show the equations you wrote?

anonymous · Answer

Rs 3 = 3 : 2 (pen to pencil)
Rs 3 = 3x+2x
Rs 3 = 5x
Rs 3/5 = x = Rs 0.60 or paise 60
Therefore one pen and pencil together cost Rs0.60 * 5 = Rs 3.00
Therefore cost of 7 pen and 7 pencil = Rs 15.00

anonymous · Answer

plse see if i have done correct or not

shubhamsrg · Answer

How do you figure 15 ? 
Seems wrong to me .

shubhamsrg · Answer

the questions tells you he purchased some pens and pencils, and asks you what no. of pens he purchased if total cost was 7