posted by A on .
how do you solve this? A dice is rolled twice. What is the probability of getting a multiple of 3 on the first roll or a total of 7?
can you solve this ? Of 1000 students surveyed, 530 were boys and 180 had bicycles. Of those who had bicycles, 30 were girls. What is the probability that a student surveyed was a boy or had a bicycle?
530+30= 560 (all you do is at the total number of boys with the number of bikes girls have)