Quiz Discussion

If (n + 2)! = 2550 (n!); find ’n’

Course Name: Quantitative Aptitude

  • 1]

    49

  • 2]

    35

  • 3]

    38

  • 4]

    43

Solution
No Solution Present Yet

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# Quiz
1
Discuss

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

  • 1]

  • 2]

  • 3]

  • 4]

    None Of These

Solution

Answer :1/2

2
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
3
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
4
Discuss

From a pack of 52 playing cards, two cards are drawn together at random. Calculate the probability of both the cards being the Kings.

  • 1]

    1/15

  • 2]

    25/57

  • 3]

    35/256

  • 4]

    None Of These

Solution
5
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

6
Discuss

Three chairs are arranged in a row facing three other chairs. 4 boys and 2 girls are to be seated on these chairs such that girls are always facing each other. In how many ways can they be seated?

  • 1]

    96

  • 2]

    72

  • 3]

    144

  • 4]

    120

Solution
7
Discuss

A, B, C, D and E sit on five chairs all of which are facing north. C will sit only on the leftmost chair and B will not sit anywhere to the left of A. In how many ways they can be seated?

  • 1]

    10

  • 2]

    18

  • 3]

    36

  • 4]

    12

Solution
8
Discuss

A five-letter word is to be formed from a group of 5 vowels and 4 consonants, using at least one vowel and at least one consonant. In how many ways the word having a greater number of consonants than vowels can be formed?

  • 1]

    40

  • 2]

    42

  • 3]

    45

  • 4]

    52

Solution
9
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
10
Discuss

How many numbers can be formed from 1, 2, 3, 4, 5 (without repetition), when the digit at the unit’s place must be greater than that in the ten’s place?

  • 1]

    60

  • 2]

    54

  • 3]

    51 / 3

  • 4]

    2 x 4!

Solution
# Quiz