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1. The average of six numbers is x and the average of three is y. If the average of the remaining three is z, then :
- A. x=y+z
- B. x=y+z
- C. x=y+z
- D. x=y+z
Answer: Option C
Explanation:
Hints: Average of 6 numbers = x
sum of 6 numbers = 6x
Average of the 3 numbers = y
sum of the 3 numbers = 3y
Average of the remaining 3 numbers = z
sum of the remaining 3 numbers = 3z
Now, we know that 6x = 3y + 3z
2x = y + z
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