sferguson sferguson

23-06-2017
Mathematics

contestada

How many permutations of the letters a,b,c,d,e,f,g either begin with an a or end with an a?

Respuesta :

mreijepatmat mreijepatmat

23-06-2017

There are 7 letters to arrange:
if they have to start with a, the remaining arrangement is 6! starting with a
Same logic if they end by a:
So the total number of permutation is 6! + 6! = 2(6!) =1440 permutation

Answer Link

Otras preguntas

In the practice of religion the 10 Commandments are to Christianity as the eight fold path is to

Which relation is necessarily true if ADDB=AEEC ? A.) DE¯¯∣∣∣∣FG¯¯ B.) DE¯¯∣∣∣∣BC¯¯ C.) FG¯¯∣∣∣∣BC¯¯ D.) AD¯¯∣∣∣∣EC¯¯

What is the Value of X?

imagine that a disorder that causes the cell cycle to stop affects the muscle cells of a frog’s leg. what consequence is most likely to follow? a.the frog will

Which of the following disorders is caused by too much hormone being secreted? A. acromegaly B. diabetes insipidis C. sterility D. pituitary dwarfism

What is an effect of Chaucer's decision to use a pilgrimage as the central premise for The Canterbury Tales? A. It sets up an expectation that exempla, which we

Buildings that are built in an earthquake zone are usually designed to withstand some of the stress caused by earthquakes and their _____. thunder compression a

Not all drugs are addictive. true false

Using your notes about loyalty in the first act of Julius Caesar, describe the character Antony as either a betrayer or a patriot. Your opinion of this characte

A roller coaster moves 200 ft. horizontally, then rises 135 ft. at an angle of 30 degrees above the horizontal. It then travels 135 ft. at an angle of 40 degree