Question

a man purchased some pens at rs.8 and some pencils at rs.2.50 each . if the total no. of pens and pencils purchased is 27 and their total cost is rs.150 , how many pens did he buy


PLEASE ANSWER !!

Answer 1

Answer:

Let the number of pens be x

and number of pencils be y

then x+y=16ory=16−x

andtheirvalue8x+1.5y=508x+(23)(16−x)=508x+24−(23)x=508x−(23)x=50−24(213x)=26∴x=4theny=16−x=16−4=12

Answer 2

let number of pencil be p

number of pens be q

so, p+q=27

p=27-q. (1)

8q+2.50p=150. (2)

from I and 2

8q+2.5(27-q)=150

8q+67.5q=150

74.5q=150

q=150÷74.5

q=2

so,from 1

p=27-2

p=25

so,

number of pens is 2

number of pencils is 25

mark me as brainliest if answer is correct and

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