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

likes

1499 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.

$Expert avatar$

Maude

4.7

108 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)

What is the equation of an ellipse centered at (h, k) with semi-major axis a and semi-minor axis b?

What are the key characteristics of the quadratic function f(x) = x^2? Discuss its vertex, axis of symmetry, and whether it opens upward or downward. How many x-intercepts does it have?

What is the simplified form of (2^3 * 5^4)^2?

New questions in Mathematics

Students Ana Beatriz and Paula decided to register on a website with exercises to study for upcoming simulations, but to register on this website, they need to choose a password consisting of five characters, three numbers and two letters (capital letters). or lowercase). Letters and numbers can be in any position. They know that the alphabet is made up of twenty-six letters and that an uppercase letter differs from a lowercase letter in a password. What is the total number of possible passwords for registering on this site?

Hey👋🏻 Tap "Create New Task" to send your math problem. One of our experts will start working on it right away!

431414-1*(11111-1)-4*(5*3)

In a random sample of 600 families in the Metropolitan Region that have cable television service, it is found that 460 are subscribed to the Soccer Channel (CDF). How large a sample is required to be if we want to be 95% confident that the estimate of “p” is within 0.03?

Consider numbers from 1 to 2023. We want to delete 3 consecutive, so that the avarage of the left numbers is a whole number. How do we do that

Two events E and F are ________ if the occurrence of event E in a probability experiment does not affect the probability of event F.

Suppose a large shipment of cell phones contain 21% defective. If the sample of size 204 is selected, what is the probability that the sample proportion will differ from the population proportion by less than 4% round your answer to four decimal places

Equivalent expression of the sequence (3n-4)-(n-2)

A regional candy factory sells a guava roll at a price of $48, the monthly fixed costs amount to $125,000 and the variable cost for making a guava roll is $28. Determine: a) The equation of the total income from the production of guava rolls.

There are four times as many roses as tulips in Claire’s garden. Claire picked half of the number of roses and 140 roses were left in the garden. How many roses and tulips were in the Garden the first?