Question

if in a class boys and girls ratio is 7:3 then find out total number of student in a class?​

Answer 1

Answer:

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Explanation:

Here’s how:

7:8 is the ratio

The total for boys is 21.

So by that respect we divide 21 by 3 to get 7. And times 7 by 3 to check calculations.

Now that’s been checked it is a simple matter of 8×3 to get the value against the 21 which is 24.

To fully check this is correct.

Take the ratio 21:24 and divide by 3 which leaves you the orginal ratio of 7:8.

Now for the final step. We know that there is 21 boys and 24 girls, as given by multiplying the given ratio 3. So now we add 21 to 24 and get 45! (which is the total number of students).

Hope this helps