Arithmetic Aptitudes › Average › Question #4599
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QThe number of quantities in group A is 10, and the number of quantities in group B is 8. The individual average of group A is 24, and the individual average of group B is 16. What is the combined average of the two groups?

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  • A 20.4 ✔ ✖
  • B 18.34 ✔ ✖
  • C 17.23 ✔ ✖
  • D 15.87 ✔ ✖
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Explanation

The combined average of the two groups is 20.44.
To find this, we can use the following steps:
The number of quantities in group A is 10, and the number of quantities in group B is 8.
The individual average of group A is 24, and the individual average of group B is 16.
The combined total of the two groups is 10 * 24 + 8 * 16 = 240 + 128 = 368.
The total number of quantities in the two groups is 10 + 8 = 18.
Therefore, the combined average of the two groups is 368 / 18 = 20.44.

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