railway RRB Technician Grade 1 Mock Test 2024 Mathematics Sets Operations on Sets

যদি X এবং Y দুটি ফাঁকা নয় এমন সেট হয় যেখানে n(X) = 17, n(Y) = 23 এবং n(X ∪ Y) = 38 হয়, তাহলে n(X ∩ Y) হয়-

1
16
2
2
3
6
4
10
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