There are 4 positions in the string that each have 25 choices (any letter in the English alphabet except A) and the other positions are filled with A, so there are 25⁴ possible strings containing exactly 7 A's.
Overall, there are 26¹¹ possible strings of length 11.
Then the probability of randomly generating a string containing exactly 7 A's is
25⁴ / 26¹¹ ≈ 0.000000000106427
to do this all you have to do is make the denominator 1 and the numerator should be 1.566666667
let the three parts be
5x + 3x + 4x = 240
so on adding
12x = 240
x = 20
so it will be divided into three parts as
5 × 20 = 100
3×20= 60
4×20 = 80
you can check by adding the answers
Answer:
0.3
Step-by-step explanation:
Answer:
35d-10
Step-by-step explanation:
distribute the -5