How many 12-bit strings (that is, bit strings of length 12) are there which: a. Start with the sub-string 011? 249 b. Have weight 8 (1.e., contain exactly 8 1's) and start with the sub-string 011? c. Either start with 011 or end with 01 (or both)? 2^9+2^10- d. Have weight 8 and either start with 011 or end with 01 (or both)?
How many 12-bit strings (that is, bit strings of length 12) are there which: a. Start with the sub-string 011? 249 b. Have weight 8 (1.e., contain exactly 8 1's) and start with the sub-string 011? c. Either start with 011 or end with 01 (or both)? 2^9+2^10- d. Have weight 8 and either start with 011 or end with 01 (or both)?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Just b and d
![How many 12-bit strings (that is, bit strings of length 12) are there which:
a. Start with the sub-string 011?
249
b. Have weight 8 (1.e., contain exactly 8 1's) and start with the sub-string 011?
c. Either start with 011 or end with 01 (or both)?
2^9+2^10-
d. Have weight 8 and either start with 011 or end with 01 (or both)?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Feca0682c-5299-46ec-a99f-9ad1cb25da66%2F6b6cca5d-8d17-4796-aa6c-e117e5041850%2F0g23usm_processed.jpeg&w=3840&q=75)
Transcribed Image Text:How many 12-bit strings (that is, bit strings of length 12) are there which:
a. Start with the sub-string 011?
249
b. Have weight 8 (1.e., contain exactly 8 1's) and start with the sub-string 011?
c. Either start with 011 or end with 01 (or both)?
2^9+2^10-
d. Have weight 8 and either start with 011 or end with 01 (or both)?
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