Answer:
(a) 0.4 or 40%
(b) 0.1 or 10%
Step-by-step explanation:
(a) If you get 4 "ones" after 10 rolls of the die, the proportion of the rolls that resulted in "ones" is:
[tex]p=\frac{4}{10}\\ p=0.4[/tex]
(b) If you get 2 "ones" after 20 rolls of the die, the proportion of the rolls that resulted in "ones" is:
[tex]p=\frac{2}{20}\\ p=0.1[/tex]