Wipro Company Numerical Ability Averages

The average of 6 observations is 12. A new seventh observation is included and the new average is decreased by 1. The seventh observation is:
A. 1
B. 3
C. 6
D. 5
E. None of these

Read Solution (Total 5)

Correct Option: C
Explanation:
Seventh observation = (7×11-6×12)=5
8 years agoHelpfull: Yes(1) No(0)

D is the correct option.
8 years agoHelpfull: Yes(1) No(0)
5 it is it
8 years agoHelpfull: Yes(0) No(0)
Let x be the summation of all observation
then, x/6=12 => x=72
now sum of new observation is be y
then, y/7=11 (as according to question )
which gives y=77 ,
therefore new observation =(77-72)=5
7 years agoHelpfull: Yes(0) No(0)
5.. ( a+b+c+d+e+f)/6=12... a+b+c+d+e+f=72.. (a+b+c+d+e+f+g)/7=11 .. 72+g=77.. g=5(ans)
6 years agoHelpfull: Yes(0) No(0)

Wipro Other Question

Two classes took the same test. One class of 20 students made an average grade of 80%, the other class of 30 students made an average grade of 70%. The average grade for all students in both classes is:
A. 75%
B. 72%
C. 74%
D. 77%
E. None of these The average of marks obtained by 120 candidates in a certain examination is 35. If the average of passed candidates is 39 and that of the failed candidates is 15. The number of candidates who passed the examination is:
A. 150
B. 110
C. 100
D. 120
E. None of these