1. The probability that your mail is delivered before 2 pm is 0.9, so the probability that the mail is delivered at 2 pm or after 2 pm (so not before 2 pm) is 1-0.9=0.1.
Remark: 0.9=9/10=90/100=90%, and 0.1 is 10%
2. Probability of the mail being delivered before 2 pm for 2 consecutive days is

3. take a look at the picture attached, the tree diagram is another method we could use.
Answer:
729
Step-by-step explanation:
Answer:
6x^10+2504/5+(9*1/1,0)
Step-by-step explanation:
Hope this helps :)
The ratio is 9/12 and you can write it as a proportion. so you multiply 9 by 100 then divide it by 12. answer is 75% chance
Answer:
89
Step-by-step explanation:
92 - 3 =89
subtract smallest from largest