Question
a bookshop has a total of 760 pens and rulers. 70% of the pens and 60% ofthe rulers were sold. the owner of the bookshop bought 41 rulers. on the end, the number of pens left was three times the number of rulers left.
300
likes1499 views
Answer to a math question a bookshop has a total of 760 pens and rulers. 70% of the pens and 60% ofthe rulers were sold. the owner of the bookshop bought 41 rulers. on the end, the number of pens left was three times the number of rulers left.
Maude
4.7104 Answers
let he has p pens and r rulers
the total is 760
p+r=760 ----eq1
70% pens sold means 0.7p sold therefore 0.3p will be left with him
60% of rulers sold means 0.6r sold therefore 0.4r will be left with him
now he bought 41 rulers therefore the total rulers he has is 41+0.4r
the number of pens is three times the number of rulers left
3(41+0.4r)=0.3p ---eq2
by eq1
3\left(41+0.4r\right)=0.3\left(760-r\right)
1.2r+123=228-0.3r
r=\frac{105}{1.5}=70
p=760-r
p=760-70
p=690
Frequently asked questions (FAQs)
Q: In ΔABC, if ∠A ≅ ∠B and AB ≅ BC, prove that AC ≅ AB.
+
What is the result of multiplying vector A = [3, 2, -1] by vector B = [-4, 1, 5]?
+
What is 36% written as a decimal?
+
New questions in Mathematics