Question

In a class of 40 students , 3/5 passed in maths while 2/5 passed in English . In which subjects did students do better​

Answer 1

Step-by-step explanation:

Let MO = the number of students who passed ONLY Mathematics, (and did not pass English);

Let EO = the number of students who passed ONLY English, (and did not pass Mathematics);

Let B = the number of students who passed BOTH English and Mathematics.

Let M = the total number of students who passed Mathematics (that is those who passed only Mathematics, plus those who passed both subjects).

Let E = the total number of students who passed English (that is those who passed only English, plus those who passed both subjects).

Then we can write these statements symbolically as follows:

E = EO + B or 34 = EO + B ...............(1)

M = MO + B or 35 = MO + B ................(2).

We add equations (1) and (2) as follows

34 + 35 = (EO + B) + (MO + B)

to obtain:

69 = EO + MO + 2B ..........(3)

Consider the total number of students in class; these are made up of three groups (those who passed only Math, those who passed only English, and those who passed both subjects:

40 = MO + B + EO .............(4)

Subtract (4) from (3) to obtain

69 - 40 = (EO + MO + 2B) - (MO + B + EO)

29 = B

Twenty-nine students passed in both subjects.

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Answer 2

Answer:

of course, the students did well in maths.

now let's keep the total students as 5 itself. here 3 out of 5 passed in maths and only 2 out of 5 passed in English.

now u would itself got the answer correct.

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