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The average of 8 numbers is 20. The average of first two numbers is $$15{1\over2}$$ and that of the next three is $$21{1\over3}$$ . If the sixth number be less than the seventh and eighth numbers by 4 and 7 respectively, then the eighth number is :
5Q:
The average of 8 numbers is 20. The average of first two numbers is $$15{1\over2}$$ and that of the next three is $$21{1\over3}$$ . If the sixth number be less than the seventh and eighth numbers by 4 and 7 respectively, then the eighth number is :
- 125true
- 227false
- 318false
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