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Question 6
Four numbers. a, b, c and d, are such that their overall average is 26.5. The average of a and b is 20. The average of c and d is:
Solution
$$\ \frac{\ a+b+c+d}{4}=26.5\ and\ \ \frac{\ a+b}{2}=20$$
by solving above we can find c+d=66
so average of c and d is 33,
Hence option 'C' is correct.
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