- Thread starter Safha
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Inside the there are a total of 48 students, so \(\displaystyle j+k+m+x+y+z+w+5=48\).

Now we are looking for z the number that take all three subjects.

The given tells us that \(\displaystyle j+x+w+z=22\) because twenty-two take physics.

\(\displaystyle x+w=4\) because four take both physics & agriculture.

You must proceed to establish all equations necessary to find the value of each variable.

Please post your results.

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Well I admit I make a stupid mistake in subtraction. Now I see that some bit of information is missing.

If only I knew how many students take only Agricultural science then there is a unique solution.