Quiz Discussion

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.

Course Name: Quantitative Aptitude

  • 1]

    2! x 19!

  • 2]

    18!

  • 3]

    18! x 2!

  • 4]

    19!

Solution
No Solution Present Yet

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# Quiz
1
Discuss

Six boys and 4 girls are to be seated in two separate rows with five chairs each, such that two particular girls are always together and all the girls are not in the same row. In how many ways can they be seated?

  • 1]

    15 * 7!

  • 2]

    20 * 8!

  • 3]

    18 * 7!

  • 4]

    (16 * 8! – 4! * 6!)

Solution
2
Discuss

In how many different ways can the letters of the word 'OPTICAL' be arranged so that the vowels always come together?

  • 1]

    120

  • 2]

    720

  • 3]

    4320

  • 4]

    2160

Solution
3
Discuss

How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed?

  • 1]

    40

  • 2]

    400

  • 3]

    5040

  • 4]

    2520

Solution
4
Discuss

A teacher has to choose the maximum different groups of three students from a total of six students. Of these groups, in how many groups there will be included in a particular student?

  • 1]

    12

  • 2]

    10

  • 3]

    8

  • 4]

    6

Solution
5
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
6
Discuss

How many words, with or without meaning, can be formed using all letters of the word EQUATION using each letter exactly once?

  • 1]

    38,320

  • 2]

    39,320

  • 3]

    38,400

  • 4]

    40,320

Solution
7
Discuss

A speaks truth in 75% cases and B in 80% of the cases. In what percentage of the cases are they likely to contradict each other, narrating the same incident?

  • 1]

    5%

  • 2]

    15%

  • 3]

    35%

  • 4]

    45%

Solution
8
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
9
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

10
Discuss

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

  • 1]

  • 2]

  • 3]

  • 4]

    None Of These

Solution

Answer :1/2

# Quiz