Using the combination formula, it is found that the photographs can be chosen in 5005 ways.
The order in which the photographs are chosen is not important, hence, the <u>combination formula</u> is used to solve this question.
Combination formula:
is the number of different combinations of x objects from a set of n elements, given by:
In this problem, 6 photographs are chosen from a set of 15, hence:

The photographs can be chosen in 5005 ways.
A similar problem is given at brainly.com/question/25648218