Question

Ivy randomly surveys students in her school to learn about mobile phone password use. Of 25 respondents 14 use a password. Based on Ivy's data how many of the 275 students in her school would be expected to use a password?

Answer 1

Hello,

14/25 = x/275

25 => 275

14 => x

x = 275 * 14 / 25 = 154

Bye :)

Answer 2

Out of 25 respondents 14 use a password: 14/25

x amount of students out of 275 use a password: x/275

Set both fractions equal to each other

14/25 = x/275

Cross multiply.

14(275) = 25(x)

3850 = 25x

Isolate the x. Note the equal sign. What you do to one side you do to the other.

25x/25 = 3850/25

x = 3850/25

x = 154

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154 students out of 275 are expected to use a password

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hope this helps