20. a frock is marked rs. 228 at a discount of 20% is given on it. what is the discount and
also find its selling price.
21. the cost of a pair of roller skates at a shop was rs. 450 .the sales tax charged was 5% .
find the bill amount.
22. radha bought a watch for rs. 3300 including tax of 10 % .find the price of the watch
before what was added.
23. sohan bought a second hand refrigerator for rs.2500, then spent rs.500 on its repairs and
sold it for rs.3300 .find his loss or gain percentage.
24. ajay sells two cycles at rs.2500 each . if he makes a profit of 20% on one and has a loss
of 25% on other ,find his overall profit or loss percentage
pls solve these questions

Design an er diagram for keeping track of information about votes taken in the u. s. house of representatives during the current two-year congressional session. the database needs to keep track of each u. s. state's name (e. g., texas', new york', california') and include the region of the state (whose domain is {northeast', midwest', southeast', southwest', west'}). each congress person in the house of representatives is described by his or her name, plus the district represented, the start date when the congressperson was first elected, and the political party to which he or she belongs (whose domain is {republican', democrat', 'independent', other'}). the database keeps track of each bill (i. e., proposed law), including the bill name, the date of vote on the bill, whether the bill passed or failed (whose domain is {yes', no'}), and the sponsor (the congressperson(s) who sponsored - that is, proposed - the bill). the database also keeps track of how each congressperson voted on each bill (domain of vote attribute is {yes', no', abstain', absent'}). additional information: