Consider the following 3x4 contingency table in which a sample of 1400 companies is summarized in terms of the company's industry type (X, Y, or Z) and geographic location (A, B, C, or D).

A B C D
X 124 110 108 114
Y 130 106 122 112
Z 128 118 112 116

What is the probability P(B∪Y)?

Question

Consider the following 3x4 contingency table in which a sample of 1400 companies is summarized in terms of the company's industry type (X, Y, or Z) and geographic location (A, B, C, or D).

A	B	C	D
X	124	110	108	114
Y	130	106	122	112
Z	128	118	112	116

What is the probability P(B∪Y)?

anonymous · Answer

P(B) = (110+106+118)/1400
P(Y) = (130+106+122+112)/1400
P(B∪Y) = P(B) + P(Y) - 106

anonymous · Answer

erm, make that P(B) + P(Y) - 106/1400