Students in an Introductory College Economics Class Were Asked How

Multiple Choice

Students in an introductory college economics class were asked how many credits they had earned in college,and how certain they were about their choice of major.Their replies are summarized below. Assuming independence,the expected frequency of very uncertain students with 60 credits or more is:

A) 12.47.
B) 2.00
C) 14.56.
D) 11.09.