/*`
Selling five candy bars means getting five successes, so successes r = 5.
The total number of trials (n, in this case, houses visited) this takes is therefore
- = sucesses + failures or k + r = k + 5.
+ = successes + failures or k + r = k + 5.
*/
double sales_quota = 5; // Pat's sales quota - successes (r).
/*`