Question

There are 30 students in our class, and 1/5 of the class has their own cellphone. Of this group of students, 1/2 of them are allowed to use social media. How many of the students have a cellphone and can use social media?​

Answer 1

Answer:

3

Step-by-step explanation:

There are 30 students in Mrs. Woodward’s class.

\dfrac{1}{5}

5

1

of the class has their own cell phone, so

\dfrac{1}{5}\cdot 30=\dfrac{1}{5}\cdot \dfrac{30}{1}=6

5

⋅30=

5

1

⋅

1

30

=6

students have their own cell phones.

\dfrac{1}{2}

2

1

of those 6 students are allowed to use social media. So,

\dfrac{1}{2}\cdot 6=\dfrac{1}{2}\cdot \dfrac{6}{1}=3

2

1

⋅6=

2

1

⋅

1

6

=3

students are allowed to use social media

Answer 2

Answer:

3 students

Step-by-step explanation:

There are 30 students in the class

1/5 of the class has their own cell phone,

so

1/5,30=1/5,30/1=6

students have their own cell phones.

1/2 of those 6 students are allowed to use social media. so,

1/2,6=1/2,6/1=3

so,

3 students are allowed to use social media