SOLUTION: In a class, the ratio of right-handed to left-handed students is 7:2. The total number of students is 36. If none of the students is ambidextrous, what is the number of left-handed

Question 1176617: In a class, the ratio of right-handed to left-handed students is 7:2. The total number of students is 36. If none of the students is ambidextrous, what is the number of left-handed students in the class?
Found 2 solutions by math_tutor2020, ewatrrr:
Answer by math_tutor2020(3817) (Show Source): You can put this solution on YOUR website!

The ratio of right-handed to left-handed is 7:2
This could mean we have 7 right-handed people and 2 left-handed people. This gives 7+2 = 9 total students in the class.

However, we're told that we actually have 36 total students. The jump from 9 to 36 is "times 4", since 36/9 = 4.

So we must multiply every value of 7:2 by 4 to get
7*4 = 28
2*4 = 8

Then note how 28+8 = 36 and how the ratio 28:8 reduces to 7:2 when you divide both parts by 4. Put another way, 7:2 turns into 28:8 when you multiply both parts by 4.

The ratio 28:8 means we have 28 right-handed people and 8 left-handed people.

Answer: 8

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

Hi the ratio of right-handed to left-handed students is 7:2. (More what one would expect) Using constant of Proportionality: 7c + 2c = 36 9c = 36 c = 4 8 the number of lefthanded in class. 28 + 8 = 36 checks. Wish You the Best in your Studies.

RELATED QUESTIONS
In a class, the ratio of right-handed students to the total number of students is 2:7.... (answered by ewatrrr)
the ratio of right handed students to left handed students in mr duggan's class is 7 to... (answered by rfer)
The ratio of the number of right-handed students in school to the number of left-handed... (answered by edjones)
The ratio of right handed students to left handed students is 9:2. There are 352 students (answered by TimothyLamb,MathTherapy)
The number of right handed students in a mathematics class is nine times the number of... (answered by TimothyLamb)
In a year 10 maths class, there are 30 students. Each student is either 15 or 16 years... (answered by Boreal)
Of the students in your class, 12% are left-handed. What fraction of the students are... (answered by Fombitz)
The ratio of left-handed to right-handed students was 3 to 14. If the total number in... (answered by KMST)
(a) It is noted that 8% of ART students are left handed. if 20 students are randomly... (answered by solver91311)