Mr. Kole has 30 students in his class. He has twice as many girls as boys. What is the ratio of boys to total students? 1:3
1:2
2:3
2:1

1:3

Step-by-step explanation:

First, you need to make a system of equations for the situation.

Let G represent the number of girls and B represent the number of boys.

Since there are twice as many girls as boys,

G = 2B

There are a total of 30 students in class so,

G + B = 30

or

G + B = TOTAL

In order to find the ratio of BOYS to the TOTAL STUDENTS,

you plug in B values that make up G.

(2B ) + B = TOTAL

3B = TOTAL

B = TOTAL / 3 or (1/3) TOTAL

Since B is one third of the total number of students, the ratio is 1:3.

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

if the probability is 1/12, 75 people will receive a $25 gift card

step-by-step explanation: