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26 November, 18:29

The ratio of boys to girls in a class is 3:1. There are 36 students in the class. How many more boys than girls are there?

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Answers (2)
  1. 26 November, 20:37
    0
    hello : 27 boys and 9 girls

    Step-by-step explanation:

    x : number of boys

    y : number of number of

    x/y = 3 ... (1)

    x+y = 36 ... (2)

    by (1) : x = 3y

    put the value of x in (2) : 3y + y = 36

    4y = 36

    divid by 4 : y = 9

    put y = 9 in (2) : x + 9 = 36

    x+9 - 9 = 36 - 9

    x = 27
  2. 26 November, 21:42
    0
    well, if you add the numbers 3+1 you get 4. from this we know that there are 4 units total. 36:4=9 so each unit is equal to 9. we can multiply 9•3 to get 27. there are 27 boys. we can multiply 9•1 to get 9 girls. subtracting 9 from 27, we get 18 more boys that girls.
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