In: Statistics and Probability
| 
 Letter  | 
 Count  | 
| 
 A  | 
 14810  | 
| 
 B  | 
 2715  | 
| 
 C  | 
 4943  | 
| 
 D  | 
 7874  | 
| 
 E  | 
 21912  | 
| 
 F  | 
 4200  | 
| 
 G  | 
 3693  | 
| 
 H  | 
 10795  | 
| 
 I  | 
 13318  | 
| 
 J  | 
 188  | 
| 
 K  | 
 1257  | 
| 
 L  | 
 7253  | 
| 
 M  | 
 4761  | 
| 
 N  | 
 12666  | 
| 
 O  | 
 14003  | 
| 
 P  | 
 3316  | 
| 
 Q  | 
 205  | 
| 
 R  | 
 10977  | 
| 
 S  | 
 11450  | 
| 
 T  | 
 16587  | 
| 
 U  | 
 5246  | 
| 
 V  | 
 2019  | 
| 
 W  | 
 3819  | 
| 
 X  | 
 315  | 
| 
 Y  | 
 3853  | 
| 
 Z  | 
 128  | 
a. Expected number of occurrence of letter A in random excerpt of 1000 letters is 81.
b. Most frequent letter is E. Expected number of occurrence of letter E in random excerpt of 1000 letters is 120.
c. Most rare letter is Z. Expected number of occurrence of letter Z in random excerpt of 1000 letters is 1.
Complete solution is given in attached images:


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