1
WB JEE 2020
MCQ (More than One Correct Answer)
+2
-0
Change Language
The equation $${x^{{{(\log 3x)}^2}}} - {9 \over 2}\log 3\,x + 5 = 3\sqrt 3 $$ has
A
at least one real root
B
exactly one real root
C
exactly one irrational root
D
complex roots
2
WB JEE 2020
MCQ (More than One Correct Answer)
+2
-0
Change Language
In a certain test, there are n questions. In this test 2n-i students gave wrong answers to at least i questions, where i = 1, 2, ..., n. If the total number of wrong answers given is 2047, then n is equal to
A
10
B
11
C
12
D
13
3
WB JEE 2020
MCQ (More than One Correct Answer)
+2
-0
Change Language
A and B are independent events. The probability that both A and B occur is $${1 \over {20}}$$ and the probability that neither of them occurs is $${3 \over {5}}$$. The probability of occurrence of A is
A
$${1 \over {2}}$$
B
$${1 \over {10}}$$
C
$${1 \over {4}}$$
D
$${1 \over {5}}$$
4
WB JEE 2020
MCQ (More than One Correct Answer)
+2
-0
Change Language
The equation of the straight line passing through the point (4, 3) and making intercepts on the coordinate axes whose sum is $$ - 1$$ is
A
$${x \over 2} - {y \over 3} = 1$$
B
$${x \over { - 2}} + {y \over 1} = 1$$
C
$$ - {x \over 3} + {y \over 2} = 1$$
D
$${x \over 1} - {y \over 2} = 1$$
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