Hey can you me posted picture of question

Each leaf on the tree diagram represents a possible combination. So we are to find the total number of combinations for the given scenario. 

There are 5 ways to select the pant, 7 ways to select a shirt and 3 ways to select the shoes.

Total number of combinations will be the product of all these ways the dress items can be selected.

So, number of combination of outfits = 5 x 7 x 3 = 105 

Therefore, option B gives the correct answer

Option a : week- amuont paid