Calculate probability for single events based on theoretical models i.e. (number of favourable outcomes) / (number of possible outcomes). Make use of a sample space to find the probability, generally of equally likely events. Use the formula P(A or B) = P(A) + P(B) for mutually exclusive events. Include examples of a probability of an event on an unbiased spinner or coloured balls in a bag. Include examples where the probability is given and the number of items needs to be found (simple cases only)Play Now