Group	Disease	No Disease	Total
Group 1	X	100	154
Group 2	6	20	26
Group 3	24	52	76
Total	84	172	256

What is theexpected cell count for the top-left cell (marked by the X in the table), if the group variable is independent of the disease status?

a. 54

b. 50.5

c. 5

d. 0.21

I got 54 but the answer is wrong. so is it 50.5?

2. Researchers investigated the issue of race and equality of access to clinical trials. Specifically, they wanted to know if any racial/ethnic group(s) is under- or overrepresented in lung cancer clinical trials. The table below shows the population distribution and the numbers of participants in clinical trials involving lung cancer.

Race/Ethnicity	White non-Hispanic	Hispanic	Black	Asian / Pacific Islander	American Indian / Alaska Native	TOTAL
Distribution of Population	75.6%	9.1%	10.8%	3.8%	0.7%	100%
Number in Lung Cancer Clinical Trials	3855	60	316	54	12	4,297

What is the expected number of white non-Hispanic participants, if the clinical trial database were representative of the population?

a.859.4

b.3855

c.3249

d.3248.5