Data Management

For PLANETS, find the number of :
4-letter words which must include a L and A

For MAMMALS, find the munber of:
a) 7-letter words
b) 7-letter word beggining with MA
c) 4-letter words
i) all letters different
ii) 2 letters same,2 different
iii) 2 pairs same leeters
iv) 3 letters same

  1. 3
asked by Lisa
  1. Can letters be used twice? Do the words have to be in the dictionary?

    posted by drwls
  2. no

    posted by Lisa
  3. In that case, for PLANETS, the possible four-letter combinations (in any order) are 5 x 4 = 20. For each combination, there are 4! = 24 ways (permutations) for arranging the letters. That makes 20x24 = 480 possible "words". Most will not be in the dctionary.

    Try your own reasoning with the MAMMALS problem. We will be glad to critique your work.

    posted by drwls

Respond to this Question

First Name

Your Response

Similar Questions

  1. sci

    Find the change in the force of gravity between two planets when the masses of both planets are doubled, but the distance between them remains the same. Please include your work!
  2. sensitive probability plz help

    (i):find the number of four letter words that can be formed from the letter history (ii):how many of them begin and end with a consonant (iii):how many contain the letter (Y) (iv):how many beging with (T) and end with a vowel
  3. Discrete Math

    Is this correct? • Using the Principle of Inclusion-Exclusion, find the number of integers between 1 and 2000 (inclusive) that are divisible by at least one of 2, 3, 5, 7. A = {n| 1 ≤ n ≤ 2000, 2 |n} B = {n| 1 ≤ n ≤
  4. Science

    Which of the following may have happened if the inner planets had greater masses during the formation of the solar system? A. The inner planets may have been even smaller and rockier. B. The inner planets may have been larger and
  5. data management

    For MAMMALS, find the munber of: a) 7-letter words b) 7-letter word beggining with MA c) 4-letter words i) all letters different ii) 2 letters same,2 different iii) 2 pairs same letters iv) 3 letters same
  6. Maths

    1)A two-figure number is written down at random. Find the probability that a)the number is greater than 44 b)the number is less than 100 2)A letter is picked at random from the english alphabet. Find the probability that a)the
  7. Discrete Math

    Can someone help? Very confused. . . John Sununus was once the governor of New Hampshire, and his name reminds one of the authors of a palindrome (a words which is spelt the same way forwards as backwards, such as SUNUNUS). How
  8. Discrete Math

    Hi there I'm confused as to how to start this problem, any help at all would be great thanks! John Sununus was once the governor of New Hampshire, and his name reminds one of the authors of a palindrome (a words which is spelt the
  9. language

    spade, sparkle, sparrow, special, specific, speckle, speech, spill, spirit, splash, splatter, splendid, split, spoke, spool, spouse, sprain, spring, sprinkle, spurt Write a letter using all the spelling words. make your spelling
  10. 5th grade math

    How do you do letter equations? "Each letter in the equation below represents a different digit from the set (1, 3, 4, 7, 8). find the value of each letter to make the equation true. Each letter must represent only one number

More Similar Questions