Isabel goes to school by one of two routes, A or B. The probability of going by route A is 30%. If she goes by route A, the probability of being late is 5% and if she goes by route B, the probability of being late is 10%. Late 0.05 Route-A 0.3 0.95 On-Time Route 0.1 Late 0.7 Route-B 0.9 On-Time Find the probability that Isabel is late for school