How many strings of six lowercase letters from the English alphabet contain

a) the letter a?

b) the letters a and b?

c) the letters a and b in consecutive positions with a preceding b. with all the letters distinct?

d) the letters a and b, where a is somewhere to the left of b in the string, with all the letters distinct?

Question

Armani Fry

6 February, 22:31

+1

Answers (1)

Know the Answer?

Lauryn Landry · Answer 1

The letters a and b becasue those are the first two letters