SSC
Sample Paper
Mock Test-11 SSC CGL Tear-II Paper-1
question_answer
Out of seven given numbers, the average of the first four numbers is 4 and that of the last four numbers is also 4. If the average of all the seven numbers is 3, fourth number is
A)3
B) 4
C) 7
D) 11
Correct Answer:
D
Solution :
Fourth number \[=(4\times 4+4\times 4-3\times 7)\] \[=(16+16-21)=11\]