Probability table with linear multiples of k: find k, then a probability

1. A.
   $\frac{1}{20},\ \frac{3}{7}$
2. B.
   $\frac{5}{21},\ \frac{3}{7}$
3. C.
   $\frac{1}{21},\ \frac{3}{7}$
4. D.
   $\frac{1}{20},\ \frac{4}{7}$

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1. A.
   $a = b$
2. B.
   $a > b$
3. C.
   a $<$ b
4. D.
   $a = \frac{1}{2}\text{ }b$

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1. A.
   $\frac{5}{6}$
2. B.
   $\frac{6}{7}$
3. C.
   $\frac{7}{8}$
4. D.
   $\frac{8}{9}$

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1. A.
   0.55
2. B.
   0.15
3. C.
   0.75
4. D.
   0.3

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1. A.
   $\dfrac{7}{10}$
2. B.
   $\dfrac{1}{10}$
3. C.
   $\dfrac{3}{10}$
4. D.
   $\dfrac{9}{10}$

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