Probability randomly selected person from us who is certain, Ask an Expert

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Poll of 1000 adults.92% of H.S. degree or less said "certain" or "little doubt". of those with with some college, college grad, and postgrad the percentages for "certain" or "little doubt" were 90, 85 and 77 respectively. the percentages of people in US with no more than H.S., S.C., C.G. and postgrad education are 49, 29, 15 and 7 respectively.

A) probability randomly selected person from US will be a C.G. and be "certain" or "little doubt"?
B) probability randomly selected person from US will be "certain" or "little doubt"?
C) probability randomly selected person from US who is certain or has little doubt has no more than a H.S. education?

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