A Mintel study asked consumers if electronic communications devices influenced whether or not they bought a certain car. The table on the next page gives the results classified by household income:
If we select a person at random from this sample:
a) What is the probability that electronic communication devices somewhat influenced their decisions?
b) What is the probability that the person is earning at least $100K?
c) What is the probability that the person was somewhat influenced by electronic communications and earns at least $100K?
d) What is the probability that electronic communications somewhat influenced the purchase or that the person earns at least $100K?

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Communications influence on car purchase, by household income, July 2011 Income Communication (e.g., hands-free calling): Very Much Somewhat Not At All Total $50K 30 26 23 79 $50K-99.9K 57 39 39 135 100K + 41 62 35 138 Total 128 127 97