Question

In a school week, one-fifth of the students take part in 100m race and on
part in 200 m race. The double of the difference of students taking part in 200 m race
and 100 m race take part in 4 x 100 m race. The rest 15 students enjoyed only. How
many students are there in the playground?
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Answer 1

Answer:

Step-by-step explanation:

Given In a school week, one-fifth of the students take part in 100 m race and one-third take  part in 200 m Race the double of the difference of student taking part in 200 race and hundred metre race take part in 4 x 100 m race The rest 15 student enjoyed only .How many student in there playground​

Let the number of students be x

1/5 of x take part in 100 m race

1/3 of x take part in 200 m race

Also 2/3 – 2/5 = = 4/15 x take part in 400 m race

Now sum of all students – x will be

So x/5 + x/3 + 4x/ 15 + 15 = x

12 x / 15 + 15 = x

12 x + 225 = 15 x

So x = 75

Therefore 75 students are in the playground