Quiz Discussion

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

Course Name: Quantitative Aptitude

  • 1]

  • 2]

  • 3]

  • 4]

    None Of These

Solution

Answer :1/2

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# Quiz
1
Discuss

In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?

  • 1]

    1/10

  • 2]

    2/5

  • 3]

    2/7

  • 4]

    5/7

Solution
2
Discuss

In how many ways can a group of 5 men and 2 women be made out of a total of 7 men and 3 women?

  • 1]

    63

  • 2]

    90

  • 3]

    126

  • 4]

    45

Solution
3
Discuss

There are 20 people among whom two are sisters. Find the number of ways in which we can arrange them around a circle so that there is exactly one person between the two sisters.

  • 1]

    2! x 19!

  • 2]

    18!

  • 3]

    18! x 2!

  • 4]

    19!

Solution
4
Discuss

How many 3-digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9, which are divisible by 5 and none of the digits is repeated

  • 1]

    5

  • 2]

    10

  • 3]

    15

  • 4]

    20

Solution
5
Discuss

There are 8 orators A, B, C, D, E, F, G, and H. In how many ways can the arrangements be made so that A always comes before B and B always comes before C.

  • 1]

    8! / 3!

  • 2]

    8! / 6!

  • 3]

    5! x 3!

  • 4]

    8! / (5! x 3!) 

Solution
6
Discuss

Ten participants are participating in a competition. In how many ways can the first three prizes be won?

  • 1]

    920

  • 2]

    680

  • 3]

    720

  • 4]

    820

Solution
7
Discuss

How many 5 digit even numbers with distinct digits can be formed using the digits 1, 2, 5, 5, 4?

  • 1]

    16

  • 2]

    24

  • 3]

    36

  • 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

Three unbiased coins are tossed. What is the probability of getting at most two heads ?

  • 1]

    3/4

  • 2]

    1/4

  • 3]

    3/8

  • 4]

    7/8

Solution
10
Discuss

If (n + 2)! = 2550 (n!); find ’n’

  • 1]

    49

  • 2]

    35

  • 3]

    38

  • 4]

    43

Solution
# Quiz