In city x four hundred people were asked if they used umbrellas frequently. in city y four hundred people were asked the same question. what total percent should be listed in the column of people who said yes?
a- 38%
b-45%
c-55%
d-90%
see attachement below.
also, i do know that the answer cannot be but i still do need ..

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.