1
MHT CET 2023 9th May Morning Shift
+2
-0

Three fair coins numbered 1 and 0 are tossed simultaneously. Then variance Var (X) of the probability distribution of random variable $$\mathrm{X}$$, where $$\mathrm{X}$$ is the sum of numbers on the uppermost faces, is

A
0.7
B
0.75
C
0.65
D
0.62
2
MHT CET 2021 21th September Evening Shift
+2
-0

an urn contains 9 balls of which 3 are red, 4 are blue and 2 are green. Three balls are drawn at random from the urn. The probability that the three balls have difference colours is

A
$$\frac{1}{14}$$
B
$$\frac{3}{14}$$
C
$$\frac{1}{7}$$
D
$$\frac{2}{7}$$
3
MHT CET 2021 21th September Evening Shift
+2
-0

It is observed that $$25 \%$$ of the cases related to child labour reported to the police station are solved. If 6 new cases are reported, then the probability that at least 5 of them will be solved is

A
$$\frac{19}{1024}$$
B
$$\frac{19}{4096}$$
C
$$\left(\frac{1}{4}\right)^6$$
D
$$\frac{19}{2048}$$
4
MHT CET 2021 21th September Morning Shift
+2
-0

In a meeting $$60 \%$$ of the members favour and $$40 \%$$ oppose a certain proposal. A member is selected at random and we take $$\mathrm{X}=0$$ if he opposed and $$\mathrm{X}=1$$ if he is in favour, then $$\operatorname{Var} \mathrm{X}=$$

A
0.36
B
0.24
C
0.6
D
0.06
MHT CET Subjects
Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
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