Quiz Discussion

A coin is tossed 5 times. What is the probability that head appears an odd number of times?

Course Name: Quantitative Aptitude

  • 1]

    1/2

  • 2]

    2/3

  • 3]

    1/3

  • 4]

    1

Solution
No Solution Present Yet

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# Quiz
1
Discuss

If four dice are thrown together, then what is the probability that the sum of the numbers appearing on them is 25 ?

  • 1]

    0

  • 2]

    1/2

  • 3]

    1

  • 4]

    1/1296

Solution
2
Discuss

If A, B and C are mutually exclusive and exhaustive events of a random experiment such that P(B)=3/2​P(A) and P(C)=1/2​P(B), then P(A∪C)=

  • 1]

    3/13

  • 2]

    6/13

  • 3]

    7/13

  • 4]

    10/13

Solution
3
Discuss

The number of circles that can be drawn out of 10 points of which 7 are collinear is

  • 1]

    130

  • 2]

    85

  • 3]

    45

  • 4]

    72

Solution
4
Discuss

The value of  75P2

  • 1]

    5450

  • 2]

    5555

  • 3]

    5550

  • 4]

    5656

Solution
5
Discuss

How many rectangles can be formed out of a chess board ?

  • 1]

    1740

  • 2]

    1230

  • 3]

    1296

  • 4]

    204

Solution
6
Discuss

A number lock on a suitcase has 3 wheels each labeled with 10 digits from 0 to 9. If the opening of the lock is a particular sequence of three digits with no repeats, how many such sequences will be possible?

  • 1]

    720

  • 2]

    760

  • 3]

    780

  • 4]

    680

Solution
7
Discuss

12 person are seated at a round table. Number of ways of selecting 2 persons not adjacent to each other is

  • 1]

    10

  • 2]

    11

  • 3]

    54

  • 4]

    48

Solution
8
Discuss

A box contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the box, if at least one black ball is to be included in the draw?

  • 1]

    32

  • 2]

    48

  • 3]

    64

  • 4]

    96

Solution
9
Discuss

How many natural numbers can be made with digits 0, 7, 8 which are greater than 0 and less than a million?

  • 1]

    496

  • 2]

    728

  • 3]

    486

  • 4]

    1084

Solution
10
Discuss

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?

  • 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

# Quiz