# Quiz Discussion

A person tosses an unbiased coin. When head turns up, he gets Rs.8 and tail turns up he loses Rs.4. If 3 coins are tossed, what is probability that he gets a profit of Rs.12?

Course Name: Quantitative Aptitude

• 1]

3/8

• 2]

5/8

• 3]

3/4

• 4]

1/8

##### Solution

Person will get profit of Rs 12 only when there is 2H (Head) and 1T (Tail)

H + H + T = 12

8 + 8 + (-4) = 12

Total outcome of 2 head and 1 tail = 23 = 8

i.e (T, H, TH, HT, HH, HHT, HTH, THH)

Total event with 2H and 1 T is 3

therfore probability = 3/8

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1
Discuss

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• 1]

63

• 2]

90

• 3]

126

• 4]

45

##### Solution
2
Discuss

In a simultaneous throw of two dice, what is the probability of getting a total of 7?

• 1]

1/6

• 2]

1/4

• 3]

2/3

• 4]

3/4

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3
Discuss

In how many different ways can the letters of the word 'DETAIL' be arranged in such a way that the vowels occupy only the odd positions?

• 1]

32

• 2]

48

• 3]

36

• 4]

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##### Solution
4
Discuss

Three chairs are arranged in a row facing three other chairs. 4 boys and 2 girls are to be seated on these chairs such that girls are always facing each other. In how many ways can they be seated?

• 1]

96

• 2]

72

• 3]

144

• 4]

120

##### Solution
5
Discuss

From among the 36 students in a class, one leader and one class representative are to be appointed. In how many ways can this be done?

• 1]

1360

• 2]

1060

• 3]

1160

• 4]

1260

##### Solution
6
Discuss

How many words can be formed from the letters of the word "SIGNATURE" so that vowels always come together.

• 1]

17280

• 2]

4320

• 3]

720

• 4]

80

##### Solution
7
Discuss

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• 1]

10

• 2]

18

• 3]

36

• 4]

12

##### Solution
8
Discuss

If ,​, are probabilities of three mutually exclusive events, then

• 1]

• 2]

• 3]

• 4]

None Of These

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9
Discuss

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• 1]

91

• 2]

71

• 3]

51

• 4]

81

##### Solution
10
Discuss

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• 1]

16

• 2]

24

• 3]

36

• 4]

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# Quiz