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wakoff
Group Title
How many permutations of the letters ABCDEFG contain:
a.) the string BCD?
b.) the string CFGA?
c.) the strings BA and GF?
if you can explain, that would be awesome! Thank you kindly.
 2 years ago
 2 years ago
wakoff Group Title
How many permutations of the letters ABCDEFG contain: a.) the string BCD? b.) the string CFGA? c.) the strings BA and GF? if you can explain, that would be awesome! Thank you kindly.
 2 years ago
 2 years ago

This Question is Closed

sauravshakya Group TitleBest ResponseYou've already chosen the best response.0
Did u mean BCD togther?
 2 years ago

kropot72 Group TitleBest ResponseYou've already chosen the best response.2
a.) Assuming "the string BCD" means the three letters are grouped together, the number of permutations of the 7 letters containing the string BCD will equal the possible number of permutations of the remaining 4 letters. Each permutation of AEFG can be placed in 5 possible ways relative to the string as follows: 1. 0 letters before the string 2. 1 letter before the string 3. 2 letters before the string 4. 3 letters before the string 5. 4 letters before the string Therefore the required number of permutations is: \[4!\times 5\]
 2 years ago
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