X=y^2-1
1 answer:
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Answer: 38
Step-by-step explanation:
- If P and Q are two different set the their difference is given by P-Q i.e. the number of elements in P bit not Q .
i.e.
Let A be the number of students who correctly answered the first question and B be the number of students who correctly answered the second question .
Given :
Then the number of students who answered the first question correctly, but not the second is given by :-
Hence, the number of students who answered the first question correctly, but not the second is 38.