**Correct Answer : A**

**Explanation :**

1/2

Correct Answered :

Wrong Answered :

A

1/2

B

3/2

C

5/2

D

7/2

Probability
Secondary Mathematics
**Correct Answer : A**

**Explanation : **

1/2

Correct Answered :

Wrong Answered :

A

16/52

B

17/52

C

4/52

D

13/52

Probability
Accounts Assistant LAHDC
**Correct Answer : A**

**Explanation : **

16/52

Correct Answered :

Wrong Answered :

A

Prior Probability

B

Posterior probability

C

Joint probability

D

None of the above

Probability
Accounts Assistant LAHDC
**Correct Answer : B**

**Explanation : **

A posterior probability, in Bayesian statistics, is the revised or updated probability of an event occurring after taking into consideration new information. The posterior probability is calculated by updating the prior probability using Baye`s theorem.

Correct Answered :

Wrong Answered :

A

0.125

B

0.5

C

1

D

0.25

Probability
Accounts Assistant LAHDC
VERIFIED
**Correct Answer : B**

**Explanation : **

Sample space: {HHH, HTH,THH,TTH, HHT, HTT,THT,TTT}

Total number of possible outcomes=8

Probability of getting at least two heads is:

P(A)=P(getting two heads)+P(getting 3 heads)

= 3/8 + 1/8

= 4/8 = 1/2 = 0.5

Correct Answered :

Wrong Answered :

A

4/9

B

3/7

C

1/2

D

1/3

A

2/7

B

1/3

C

1/6

D

3/7

Probability
JSA 2021
**Correct Answer : D**

**Explanation : **

P(X U Y) = P(X) + P(Y) - P(X ∩ Y).

Since X and Y are independent events therefore

P(X ∩ Y) = P(X) x P(Y).

0.6 = P(X) + 0.3 - P(X) x 0.3

0.6 = 0.7 P(X) + 0.3

0.3 = 0.7 P(X)

P(X) = 0.3/0.7

=3/7

Correct Answered :

Wrong Answered :

A

1/7

B

1/5

C

2/7

D

2/5

Probability
JSA 2021
**Correct Answer : C**

**Explanation : **

Let A be the event boy speaks truth

P(A)=2/3

Let B be the Event dice shows 3

P(B) = 1/6

using Bayes therorem

P(B|A) = (P(B).P(A|B))/( P(B) . P(A|B) + P(~B). P(A|~B) )

= (2/18)/(2/18 + 5/18) =2/7

Correct Answered :

Wrong Answered :

A

1/4

B

1/13

C

1/52

D

1/2

A

5/21

B

10/21

C

10/19

D

5/7

A

31/32

B

1/64

C

1/32

D

63/64

Probability
JSA 2021
**Correct Answer : A**

**Explanation : **

First find the probability that NO heads turn up i.e., five tails.

That would be (1/2)^{5} = 1/32.

For at least one heads to occur is the complement of all tails. It`s probability is 1 - 1/32 = 31/32

Correct Answered :

Wrong Answered :

A

1/120

B

1/5

C

1/180

D

1/30

A

1/72

B

5/12

C

5/24

D

1/36

A

1/5

B

1/2

C

1/6

D

1/3

A

1/26

B

1/52

C

2/51

D

1/102

Probability
JSA 2021
**Correct Answer : D**

**Explanation : **

There are total 13 cards of club, so probability that one card is spade is 13/52

According to the questions cards are drawn without replacement. So only 51 cards are left.

Again there are 26 red cards and only two among them are kings

So probability of red king is 2/51

Probability that one card is a club and other card is king of red colour is 13/52 * 2/51 = 1/102

Correct Answered :

Wrong Answered :

A

1/9

B

1/6

C

7/36

D

5/36

Probability
JSA 2021
**Correct Answer : D**

**Explanation : **

Let P(E) be the event of getting sum = 6 .

To get a sum of 6, the possible favorable outcomes are:

(1,5), (2,4), (3,3), (4,2), and (5,1).

Thus, there are 5 favorable outcomes out of 36 hence P(E) = 5/36

Correct Answered :

Wrong Answered :

A

5/32

B

15/64

C

5/64

D

15/32

A

5/8

B

1/4

C

1/2

D

3/8

Probability
JSA 2021
VERIFIED
**Correct Answer : C**

**Explanation : **

1/2

Correct Answered :

Wrong Answered :

A

3/5

B

4/5

C

1/4

D

3/4

Probability
Assistant Compiler 2021
**Correct Answer : D**

**Explanation : **

3/4

Correct Answered :

Wrong Answered :

A

Turnout

B

Rigging

C

Booth Capturing

D

Level Playing field

Probability
Assistant Compiler 2021
**Correct Answer : A**

**Explanation : **

Turnout

Correct Answered :

Wrong Answered :

A

1/3

B

3/5

C

2/5

D

2/3

Probability
Assistant Compiler 2021
**Correct Answer : A**

**Explanation : **

1/3

Correct Answered :

Wrong Answered :

A

0.6

B

0.3

C

0.5

D

0.4

Probability
Assistant Compiler/Caretaker
**Correct Answer : D**

**Explanation : **

0.4

Correct Answered :

Wrong Answered :

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