19-03-2017
Mathematics

contestada

HELP PLEASE
there are 30 students in a class
the ratio of girls to boys is 2:3
work out the Number of boys in the class
PLEASE EXPLAIN HOW

Respuesta :

daniella1742 daniella1742

19-03-2017

So you know there are 30 students. Your ratio is 2:3. You add them together that is five. 30 divided by five is six.

6x2= 12 girls

6x3= 18 boys
18+12= 30
This shows there are 18 boys

Answer Link

Otras preguntas

On D-Day, June 6, 1944, Allied forces A. sent thousands of troops to Berlin. B. took control of many Japanese islands. C. fought the Nazi troops at Stalin

Consider the first-order reaction described by the equation At a certain temperature, the rate constant for this reaction is 5.82 × 10 − 4 s − 1 5.82×10−4 s−1 .

Alex earns a \$35{,}000$35,000dollar sign, 35, comma, 000 salary in the first year of his career. Each year, he gets a 3\%3%3, percent raise. Which expression g

nosotros _______ galletas para la fiesta. Sara ____ que escribir las invitaciones.

As a manager, two of Sylvia's strengths are her ability to communicate goals clearly, and her ability to guide, coach, and motivate workers. Based on these stre

Solve for x. 7/3 = 6/x

What are at least two characteristics (possibly called 'advantages') for Deaf children born to Deaf parents? a. Deaf children of Deaf parents have the benefit

A publisher reports that 80% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually different from the rep

Mrs. Chan bus a new car for $21,000. She pays a sales tax of $0.06 for every $1. She pays a property tax of $16.80 on every $1,000 of the value. If the property

If you lived on a fixed income, how would you be affected by inflation?You would benefit because you would have more purchasing power.You would be financially s