Plz help me to solve this question. This is of Profit loss and simple interest.
Answer is Rs 20 each.
I want full process.
I will mark you brainlist if you write the full process.

A shopkeeper bought 1000 glass tumblers. 100 of them were broken and he sold the remaining tumblers at Rs21 each. If he made a loss of 5.5 %, at what purchase each glass tumblers​

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Choose the right classification of 5x + 3x^4 - 7x^3 + 10 by number terms and he degree 1. third degree polynomial 2. fourth degree polynomial 3. sixth degree polynomial 4. first degree binomial