Answer:welp
Step-by-step explanation:welp
Answer: There were 80 questions in the homework.
Step-by-step explanation: You can solve this by making a proportion like 50/x = 62.5/100. Then you do (50*100) / 62.5 and get 80 as your final answer. Hope this helps!
Answer:
Yes
Step-by-step explanation:
Since P(A)=0.7 and P(A and B)=0.28, then P(B) must be 0.4 because 0.7*0.4=0.28.
Since P(A and B) is a combined probability, P(A) and P(B) are independent.
