# Question: The probabilities that the serviceability of a new X ray machine

The probabilities that the serviceability of a new X-ray machine will be rated very difficult, difficult, aver-age, easy, or very easy are, respectively, 0.12, 0.17, 0.34, 0.29, And 0.08. Find the probabilities that the serviceability of the machine will be rated

(a) Difficult or very difficult;

(b) Neither very difficult nor very easy;

(c) Average or worse;

(d) Average or better.

(a) Difficult or very difficult;

(b) Neither very difficult nor very easy;

(c) Average or worse;

(d) Average or better.

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