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COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

Five persons A, B, C, D and E are in queue of a shop. The probability that A and B are always together is

A
$$\frac{2}{5}$$
B
$$\frac{1}{4}$$
C
$$\frac{3}{5}$$
D
$$\frac{2}{3}$$
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

If the probability for A to fail in an examination is 0.2 and that for B is 0.3, then the probability that either A or B fail is

A
0.38
B
0.44
C
0.50
D
0.94
3
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

Three vertices are chosen randomly from the seven vertices of a regular 7-sided polygon. The probability that they form the vertices of an isosceles triangle is

A
$$\frac{1}{7}$$
B
$$\frac{1}{3}$$
C
$$\frac{3}{7}$$
D
$$\frac{3}{5}$$
4
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

If A, B and C are three mutually exclusive and exhaustive events such that P(A) = 2P(B) = 3P(C). What is P(B)?

A
$$\frac{6}{11}$$
B
$$\frac{6}{22}$$
C
$$\frac{1}{6}$$
D
$$\frac{1}{3}$$
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