Question

home. Assume that she walks only east or south 18. Nadia's office is four blocks east aa three when going from home to work. Ue Pascal's method to deternine how many different routes Nadia can take. 13 35 eyyoa b) Use a permutation calculation to determine how many different routes Nadia cah take [2]1 20
How many permutations are there and show steps to how to get the answer in that form with permutation calculation

Answer 1

here as Nadia should take total 7 steps out of which 4 are in east and 3 are in south

therefore total arrangements =choose 4 from 7 =₇C₄ =7!/(4!*(7-4)!) =7!/(4!*3!)=7*6*5*4!/(4!*3*2*1)

=35

( please revert for any clarification required)