Maths

Please could I have some guidance and advice on the following question? A multiple choice question has 4 options, A,B,C and D. The numbers of students choosing the options are in the ratio 3:1:2:14. I need to calculate the number of students choosing each option, (there are 1260 students), I also need to explain how I can check that my answers are correct.

Here is what I have attempted so far, first I have added the ratio 3;1:2:14 together which makes 20. I have then divided the number of students (1260) by 20 which gives 63 . I have then used 63 as a denominator with the ratio figures as the numerator, so 3/63, 1/63, 2/63, 14/63. I have then multiplied each fration by the total amount of students which gave me the totals 60,20, 40 ,280. I thought this gave me the answer for the amount of students choosing each option, however, how do I explain that my answers correct, I thought that I could add the students together but that only came to 400, could someone tell me if i have gone wrong somewhere?! Sorry its a bit long winded, thanks for any help in advance

1. 👍 0
2. 👎 0
3. 👁 70
1. Hmmmm.

A= 3/20*1260 which is the fraction of the student population= 3*63=189
Do this for the others. Your way is wrong.

1. 👍 0
2. 👎 0
2. That would make more sense! Many thanks

1. 👍 0
2. 👎 0
posted by David

Similar Questions

1. Statistical concept 68-95-99.7

1. A student taking a midterm exam in Ancient History comes to two questions pertaining to a lecture that he missed, and so he decides to take a random guess on both questions. One question is true-false and the other is multiple

asked by Surpreet Pororsha on April 21, 2016
2. Stat HW for.

1. A student taking a midterm exam in Ancient History comes to two questions pertaining to a lecture that he missed, and so he decides to take a random guess on both questions. One question is true-false and the other is multiple

asked by Jen N. on April 21, 2016
3. Career

Please check my answers. Thank you! The amount of goods and services that people want to buy. Producers Consumers Supply Demand* Question 2 (Multiple Choice Worth 10 points) (02.08 LC) Knowledge and tools that enable us to do new

asked by Anonymous on September 23, 2016
4. Math

a 10 question multiple choice test has 4 possible answer for each question. A student selects at least 6 correct answers. Find probability of this event: (multiple choice) A) .118 B) .995 C) .068 D) .571

asked by Matt Borchelt on December 13, 2011
5. English for john browm

Let me give you something on "multiple-choice" items that may help you to guess better. Many teachers prepare multiple-choice tests because they are easy to mark and offer the student the advantage of actually seeing what the

asked by SraJMcGin on May 7, 2009
6. stats

You took a 5-question multiple choice quiz with 4 choices for each question. If you guess at random on each question, what is the probability that you get at least one question correct?

asked by sia on November 15, 2011
7. character education

____________ is necessary to develop positive social relationships. Charm Respect Talent B? Question 18 (true/false) An individual's identity is rarely influenced by his or her peers and friends. True False False? Question 19

asked by Bri on December 1, 2017
8. Math

A history quiz consists of 60 points and contains questions that ate either true/false or multiple-choice. If a true/false question is worth 3 points and a multiple-choice question is worth 8 points, and the quiz has at least one

asked by Suzan on January 23, 2018
9. calculus

this question is a multiple choice question, however i don't know how to start or finish it. The solution set of |3x+2|

asked by Selly on February 25, 2010
10. Probability

Mary took a 20 question multiple-choice exam where there are 4 choices for each question and only 1 of those choices is correct. Rather than reading the question, Mary simply puts a random choice of answer down for each question.

asked by John on January 5, 2013
11. prealgbra

solve by simulating the problem.you have a 5 -question multiple -choice test. each question has four chices. you don't know any of the answers. what is the experimental probility that you will guess exactly three out of five

asked by sandr on June 28, 2012

More Similar Questions