First 5 question..........I’ll mark u brainliest if u give all answers step by step
Answers
Step-by-step explanation:
1. 4 buses run from Bhopal to Gwalior which means 4 buses run from Gwalior to Bhopal too. So he have 4 choice to go from Gwalior to Bhopal. But have 3 choice to return back as it says that he return back in different bus. So in total he can have 12 possible ways(4*3).
2. The total ways of answering would be. 4x4x4x4x4=4^5 that will be 1024
3.If the variable name is consist only of a letter, then that letter can be chosen in 26 ways from the alphabets.
If the variable name is consist only of a letter, then that letter can be chosen in 26 ways from the alphabets.If the code is created using a letter followed by a digit, then code can be created in 26×10=260 ways. As the letter has 26 choices and the digit has 10 choices.
If the variable name is consist only of a letter, then that letter can be chosen in 26 ways from the alphabets.If the code is created using a letter followed by a digit, then code can be created in 26×10=260 ways. As the letter has 26 choices and the digit has 10 choices.Hence the code can be created in 260+26=286 ways.
4. Of ways the can be seated=5×4×3×2×1=120. So, 5 people can be seated in 5 seats in 120 ways.
5. First and second prizes can be given in Mathematics in (30×29) ways. First and second prizes can be given in Physics in (30×29) ways.
if u ask one by one the its easy for me