使用jQuery使用数组的第n个值填充第n个表单元素

I would like to know how to populate the nth hidden field, with the nth value of the array I've created below using jQuery. I've successfully created an array that groups the 3 checkbox options (if they are checked) in parentheses into the array. EX: [(A,B),(A,C),(A,B,C)...]. I would like to know how to populate the nth hi