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  1. H

    Permutation and combination question (pretty tough)

    like fibonacci sequence number 21?
  2. H

    Permutation and combination question (pretty tough)

    @Qeru pls help, I have one more question above
  3. H

    Permutation and combination question (pretty tough)

    Thankyou very much Qeru, How about if it was in 2 dimensions, so like if a person could go 1 or 2 steps, and they had to go forward 10 steps, then right 10 steps
  4. H

    Permutation and combination question (pretty tough)

    BRUH
  5. H

    Permutation and combination question (pretty tough)

    Could this be done combinatorically (not using fibonacci)
  7. H

    Permutation and combination question (pretty tough)

    Hi, thanks for replying. How did you get 55?
  8. H

    Permutation and combination question (pretty tough)

    Jessica is about to walk a flight 10 stairs. She can take either one or two stairs at a time. How many different ways can she walk up the flight of stairs? The answer is 89, just not sure how
  9. H

    Tricks in permutation and cominations

    How did you get this answer?, the only way i can think off getting this is by listing out all the options for S behind H. I am super confused rn
  10. H

    Tricks in permutation and cominations

    That is so correct, as i do the questions, i can see that there is very little change, although, how do i counter the proof questions, those tend to be harder
  11. H

    Tricks in permutation and cominations

    Would an example being using tree diagram instead of multiplication and addition principal
  13. H

    Tricks in permutation and cominations

    Thats true, as i do alot of questions i see that there are alot of variation
  14. H

    Tricks in permutation and cominations

    I am about to start this topic, so i was wondering if there was any tips, tricks, or anything in general to lookout for
  15. H

    Permutation and combinations, confusing question

    THANKS ALOT FOR THE HELP I WAS STUCK ON THIS QUESTIONS OMG!!
  16. H

    Permutation and combinations, confusing question

    Thanks for the answer, i think i understand how to solve this but the book says answer is 12
  17. H

    Permutation and combinations, confusing question

    How many ways can you make change for 50 cents using 5, 10 and 20 cent pieces
  19. H

    Find λ for the points X(−1, 0), Y (1, λ) and Z(λ, 2), if angle YXZ = 90◦

    Ahhh, interesting approach, i understand now
  20. H

    Find λ for the points X(−1, 0), Y (1, λ) and Z(λ, 2), if angle YXZ = 90◦

    Just understood it, THANKS
  21. H

    Find λ for the points X(−1, 0), Y (1, λ) and Z(λ, 2), if angle YXZ = 90◦

    Please help me with this question, i have tried to consider that the two gradients are XY and XZ, because when multiplied it should give -1, but λ cancels when doing so
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