Question
In how many distinct ways can the letters of the word
"MANAGEMENT" be arranged so that all the vowels are always together? (Assume identical letters are indistinguishable.)Solution
ATQ, Word: M A N A G E M E N T Counts: A(2), E(2), M(2), N(2), G(1), T(1). Vowels: A, A, E, E (4 letters, with 2 A’s and 2 E’s). Treat them as one block [V]. Consonants: M, M, N, N, G, T (6 letters). Total items to arrange = 6 consonants + 1 vowel-block = 7 items: [V], M, M, N, N, G, T. Step 1: Arrange 7 items: Ways = 7! / (2! × 2!) = 5040 / 4 = 1260. Step 2: Arrange 4 vowels within [V]: A, A, E, E. Ways = 4! / (2! × 2!) = 24 / 4 = 6. Total arrangements = 1260 × 6 = 7560.
7, 15, 31, 79, 271, 1221
6, 22, 76, 314, 1580, 9600
- Find the wrong number in the given number series.
7, 16, 34, 70, 144, 290 Find the wrong number in the given number series.
5, 10, 20, 40, 85, 1601286, 1061, 865, 696, 560, 431, 331
120, 146, 198, 276, 372, 510
14Â Â Â Â 15Â Â Â Â Â 24Â Â Â Â Â Â 50Â Â Â Â Â Â 98Â Â Â Â Â 179
...Find the wrong number in the given number series.
253, 542, 216, 579, 179, 620
Find the wrong number in given number series.
1500, 1450, 1390, 1350, 1240, 1150
Find the wrong number in the given number series.
22, 29, 50, 89, 134, 197