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


  • Options
  • A. 120960
  • B. 120000
  • C. 146700
  • D. None of these

  • Correct Answer
  • 120960 

    Explanation

    In the word 'MATHEMATICS', we treat the vowels AEAI as one letter.

     

    Thus, we have MTHMTCS (AEAI).

     

    Now, we have to arrange 8 letters, out of which M occurs twice, T occurs twice and the rest are different.

     

    Number of ways of arranging these letters = 8!/(2! x 2!)= 10080.

     

    Now, AEAI has 4 letters in which A occurs 2 times and the rest are different.

     

    Number of ways of arranging these letters =4!/2!= 12.

     

    Required number of words = (10080 x 12) = 120960


  • Permutation and Combination problems


    Search Results


    • 1. In how many ways a committee, consisting of 5 men and 6 women can be formed from 8 men and 10 women?

    • Options
    • A. 11670
    • B. 12000
    • C. 11760
    • D. 20050
    • Discuss
    • 2. Suppose you can travel from a place A to a place B by 3 buses, from place B to place C by 4 buses, from place C to place D by 2 buses and from place D to place E by 3 buses. In how many ways can you travel ?from A to E?

    • Options
    • A. 36
    • B. 64
    • C. 74
    • D. 72
    • Discuss
    • 3. In a G - 20 meeting there were total 20 people representing their own country. All the representative sat around a circular table. Find the number of ways in which we can arrange them around a circular table so that there is exactly one person between two representatives namely Manmohan and Musharraf.

    • Options
    • A. 2 x (17!)
    • B. 2 x (18!)
    • C. (3!) x (18!)
    • D. (17!)
    • Discuss
    • 4. From a pack of 52 cards, 3 cards are drawn together atrandom, What is the probability of both the cards are king?

    • Options
    • A. 1/5225
    • B. 1/5525
    • C. 5525
    • D. 1/525
    • Discuss
    • 5. How many 4-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?

    • Options
    • A. 60
    • B. 48
    • C. 36
    • D. 20
    • Discuss
    • 6. Find the total number of distinct vehicle numbers that can be formed using two letters followed by two numbers. Letters need to be distinct

    • Options
    • A. 65000
    • B. 64000
    • C. 72000
    • D. 36000
    • Discuss
    • 7. 12 points lie on a circle. How many cyclic quadrilaterals can be drawn by using these points?

    • Options
    • A. 500
    • B. 490
    • C. 495
    • D. 540
    • Discuss
    • 8. Find the number of ways to take 4 people and place them in groups of 3 at a time where order does not matter?

    • Options
    • A. 4
    • B. 12
    • C. 36
    • D. 16
    • Discuss
    • 9. How many ways are there to deal a five-card hand consisting of three eight's and two sevens?

    • Options
    • A. 36
    • B. 72
    • C. 24
    • D. 16
    • Discuss
    • 10. In how many ways can the letters of the word ABACUS be rearranged such that the vowels always appear together?

    • Options
    • A. 4!/2!
    • B. 3!/2!
    • C. (4! x 3!) / 2!
    • D. 36
    • Discuss


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