A bag contains 6 red balls, 3 black balls and 5 green balls. What is the ratio of black balls to the total number of balls in the bag?
The pictograph given below shows the number of malls in a few cities.
Scale: =10 malls, =5 malls.
Observe the pictograph carefully and answer the following questions :
a) Which city has exactly 70 malls ?
b) In which city did the builders construct most number of malls ?
c) Which two cities have equal number of malls ?
d) What is the total number of malls in all the cities ?