Overall mean and the means of some subgroups: find the mean (or value) of the rest

1. A.
   64
2. B.
   65
3. C.
   68
4. D.
   74

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1. A.
   70
2. B.
   65
3. C.
   60
4. D.
   50

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1. A.
   10.0
2. B.
   10.5
3. C.
   11.0
4. D.
   11.5

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1. A.
   17 years
2. B.
   17.5 years
3. C.
   18 years
4. D.
   18.5 years

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1. A.
   Less than 4.2 feet
2. B.
   More than 4.2 feet but less than 4.3 feet
3. C.
   More than 4.3 feet but less than 4.4 feet
4. D.
   More than 4.4 feet but less than 4.5 feet

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1. A.
   $(p - 1)$
2. B.
   $(p - 2)$
3. C.
   $(p - 3)$
4. D.
   $p$

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1. A.
   310
2. B.
   320
3. C.
   330
4. D.
   340

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