Question

In a school there are 2000 students out of which 200 student did not appeared in an examination and 30%of the students were failed . Find the number of students passed in the examination​

Answer 1

Step-by-step explanation:

I’ll try to answer this without using any equations and how you can do it mentally.

First thing, as there are 200 students and the numbers are given in percent, we’ll work with a class of 100 students and later just take two times the answer.

So we have that 62 students passed in Hindi. So how many students DID NOT pass in Hindi? It would be 38, (100 - 62).

Out of those 38, 25 are those who also failed in English. So how many are those out of 38 who passed in English? It would be 13, (38 - 25).

So we know that there are 13 students who passed in English but failed in Hindi. We need to find out how many students passed in English but also passed in Hindi.

That would simply be 58 - 13, which is 45. Because there are 58 students who passed in English but out of them 13 failed in Hindi, so we have to exclude those.

So there are 45 students who passed in both the subjects.

So for a class of 200, the number of students will be twice that, that is 90.

hope it helps

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