Answer:
Joshua had $25 on Monday.
Explanation:
We are given the following information:
Money spend on each day for lunch = $3
Number of days he attend school in a week = 5
Total money spent on lunch =

Money spent on Tuesday for ticket = $5
Money spent on Friday = $2
Money left on Friday = $3
Total money in the start of week =

Thus, Joshua had $25 on Monday.