Q227
The average of 8 numbers is 20. The average of first two numbers is 151/2 and that of the next three is 211/3 . If the sixth number be less than the seventh and eighth numbers by 4 and 7 respectively, then the eight number is-
The average of 8 numbers is 20. The average of first two numbers is and that of the next three is . If the sixth number be less than the seventh and eighth numbers by 4 and 7 respectively, then the eight number is-
A.
18
B.
22
C.
25
AnswerD.
27
Answer: Option C
Solution
Answer: Option C
Solution:
Let the eight number be xThen, sixth number = (x - 7)
Seventh number = (x - 7) + 4 = (x - 3)
So,