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 single throw with four dice,the probability of throwing seven is

  • 1]

    20/64

  • 2]

    24/65

  • 3]

    22/84

  • 4]

    24/84

Solution
2
Discuss

Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even?

  • 1]

    1/2

  • 2]

    3/4

  • 3]

    3/8

  • 4]

    5/16

Solution
3
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

4
Discuss

In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be there?

  • 1]

    159

  • 2]

    194

  • 3]

    205

  • 4]

    209

Solution
5
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
6
Discuss

How many four-digit numbers, each divisible by 4 can be formed using the digits 5, 6, 7, 8, 9, repetition of digits being allowed in any number?

  • 1]

    75

  • 2]

    100

  • 3]

    125

  • 4]

    150

Solution
7
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
8
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
9
Discuss

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

  • 1]

    12

  • 2]

    15

  • 3]

    18

  • 4]

    -1

Solution
10
Discuss

Find the probability that a leap year selected at random will contain 53 Sundays

  • 1]

    2/7

  • 2]

    3/7

  • 3]

    2/3

  • 4]

    5/6

Solution
# Quiz