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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.
 one year ago
 one year 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.
 one year ago
 one year ago

This Question is Closed

sauravshakya Group TitleBest ResponseYou've already chosen the best response.0
Did u mean BCD togther?
 one year 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: \[4!\times 5\]
 one year ago
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