A bag contains 90 balls. The ratio of the colours red to white to blue is 1:2:3
a) Calculate the probability of choosing:
(i) a red ball
(ii) not a red ball
(iii) a white or a red ball.
b) How many balls of each colour are there?
a

The monthly texting plan of all star cell is $11 per month and $0.25 per text. the monthly texting plan of top line cell is $14 per month and $0.15 per text. a student wants to set up a system of equations to find the number of texts for which the total monthly cost of the two companies is the same. he uses the variables x and y. he lets y represent the total monthly cost. what will x represent? x = number of texts x = cost of the total number of texts x = total monthly cost x = cost of each text