Meagan Dubean manages a portfolio of 200 common stocks. Her staff classified the portfolio stocks by 'industry sector' and 'investment objective.
Investment Industry Sector
Objective Electronics Airlines Healthcare Total
Growth 100 10 40 150
Income 20 20 10 50
Total 120 30 50 200
If a stock is selected randomly from Meagan's portfolio, P (Healthcare ∪ Electronics) = ________ .
A) 0.25
B) 0.85
C) 0.60
D) 0.75
E) 0.90
If x is a binomial random variable with n=8 and p=0.6, what is the probability that x is equal to 4?
A) 0.500
B) 0.005
C) 0.124
D) 0.232
E) 0.578