Find the sum, if it exists, of the infinite geometric series that is related to the infinite geometric sequence 1,521 1,369 1,232 …

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

In a school 2/3 of the students study a language of those who study a language 2/5 study french

Write 17/20 as a decimal and as a percent.