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

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

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
3
Discuss

What is the sum of all 4 digit numbers that can be formed by the digits 1, 2, 3, 4 each exactly once

  • 1]

    55566

  • 2]

    66660

  • 3]

    56456

  • 4]

    84738

Solution
4
Discuss

If (n + 2)! = 2550 (n!); find ’n’

  • 1]

    49

  • 2]

    35

  • 3]

    38

  • 4]

    43

Solution
5
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
6
Discuss

If 18C18Cr+2 ; find rC5.

  • 1]

    56

  • 2]

    63

  • 3]

    49

  • 4]

    42

Solution
7
Discuss

 

In how many ways can the letters of the word 'LEADER' be arranged?

  • 1]

    360

  • 2]

    720

  • 3]

    120

  • 4]

    None Of These

Solution
8
Discuss

A, B, C, and D are four points, any three of which are non-collinear. Then, the number of ways to construct three lines each joining a pair of points so that the lines do not form a triangle is

  • 1]

    7

  • 2]

    8

  • 3]

    9

  • 4]

    24

Solution
9
Discuss

If C(n, 7) = C(n, 5), find n

  • 1]

    12

  • 2]

    15

  • 3]

    18

  • 4]

    -1

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