Out of 30 students surveyed, 17 have a dog. Based on these results, predict how many of the 300 students in the school have a dog.
Answer (3)
17 / 30 = x / 300
cross multiply
30x = 5,100
divide by 30
x = 170
or
30 17 ∗ 10 = 300 170
if it is simpler.
F ro m p ro p or t i o n : 30 s t u d e n t s 17 d o g s 300 s t u d e n t s x d o g s C ross m u lt i pl i c a t i o n 30 x = 300 ∗ 17 30 x = 5100 ∣ d i v i d e b y 30 x = 170 T h ere w i ll b e 170 d o g s f or 300 s t u d e n t s .
By setting up a proportion based on the survey data, we calculated that approximately 170 out of 300 students in the school have a dog. This was done using the ratio of students with dogs from the survey and scaling it up. Therefore, we predict that around 170 students might have dogs.
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