A bag contains some beads.
The colour of each bead is red or green or blue.
Binita is going to take a bead at random from the bag.
The probability that she will take a red bead is 0.4
The probability that she will take a green bead is 0.5
There are 80 beads in the bag.
Work out the number of red beads in the bag.
(2 marks)
red beads