alleryਜੇਕਰ P = {1, 2, 3, 4, 5} ਅਤੇ Q = {4, 5, 6, 7}, ਤਾਂ P ਵਿੱਚ ਕਿੰਨੇ ਤੱਤ ਹਨ ਪਰ Q ਵਿੱਚ ਨਹੀਂ?
A2
B4
C3
D5
Answer & Solution
Correct answer: C. 3
P ਤੋਂ ਸਾਂਝੇ 4 ਅਤੇ 5 ਨੂੰ ਹਟਾਉਣ ਨਾਲ 1, 2 ਅਤੇ 3 ਰਹਿ ਜਾਂਦੇ ਹਨ।
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