hai người cùng ứng tuyển vào một công ty. gọi Ai= "người thứ i trúng tuyển", i= 1,2 diễn tả những biến cố sau

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?

If you answer 2+2 you will get over 80 points

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?