An official from the securities commission estimates that 75 of ...

[lidoalex]

An official from the securities commission estimates that 75 of all online bankers have profited from the use of insider information. Assume that 15 online bankers are selected at random from the commission's registry. What is the expected number of Online bankers who have profited from the use of insider information?

Question 2

Fifteen percent of the students in a School of Business Administration are majoring in Economics, 20 in Finance, 35 in Management, and 30 in Accounting. The graphical device(s) that can be used to present these data is(are) _____.
 a. a line graph
  b. only a bar chart
  c. only a pie chart
  d. both a bar chart and a pie chart

[nickk12214]

Answer to Question 1

E(X) = 11.25

Answer to Question 2

d

[lidoalex]

TYSM

[nguyenhoanhat]

Excellent