1
JEE Main 2021 (Online) 16th March Morning Shift
+4
-1
The number of elements in the set {x $$\in$$ R : (|x| $$-$$ 3) |x + 4| = 6} is equal to :
A
4
B
2
C
3
D
1
2
JEE Main 2021 (Online) 26th February Morning Shift
+4
-1
Let R = {(P, Q) | P and Q are at the same distance from the origin} be a relation, then the equivalence class of (1, $$-$$1) is the set :
A
$$S = \{ (x,y)|{x^2} + {y^2} = \sqrt 2 \}$$
B
$$S = \{ (x,y)|{x^2} + {y^2} = 2\}$$
C
$$S = \{ (x,y)|{x^2} + {y^2} = 1\}$$
D
$$S = \{ (x,y)|{x^2} + {y^2} = 4\}$$
3
JEE Main 2020 (Online) 5th September Morning Slot
+4
-1
A survey shows that 73% of the persons working in an office like coffee, whereas 65% like tea. If x denotes the percentage of them, who like both coffee and tea, then x cannot be :
A
63
B
36
C
54
D
38
4
JEE Main 2020 (Online) 4th September Evening Slot
+4
-1
Let $$\mathop \cup \limits_{i = 1}^{50} {X_i} = \mathop \cup \limits_{i = 1}^n {Y_i} = T$$ where each Xi contains 10 elements and each Yi contains 5 elements. If each element of the set T is an element of exactly 20 of sets Xi’s and exactly 6 of sets Yi’s, then n is equal to :
A
30
B
50
C
15
D
45
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