Explanation
We have,
Number of boys $$=32$$
Number of girls $$=18$$
Then,
Total students in class
$$ =32+18 $$
$$ =50 $$
The ratio of number of boys to students in class is
$$ =\dfrac{Boys}{Total\,students} $$
$$ =\dfrac{32}{50} $$
$$ =\dfrac{16}{25} $$
$$=16:25$$
Hence, this is the answer.
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