Wipro Company Numerical Ability Averages

The average of 25 results is 18. The average of first twelve of them is 14 and that of last twelve is 17. The thirteenth result is :

a. 28
b. 78
c. 72
d. 85

Read Solution (Total 1)

average=18;
total no.=25;
avg of 1st 12=12*14;
avg of last 12=12*17;

so, avg= sum/totalno.;
18= (12(14)+x+12(17)) / 25 ;
solve for x..
x=78;
is the ans..;
9 years agoHelpfull: Yes(7) No(2)

Wipro Other Question

In seven given numbers, the average of first four numbers is 4 and that of the last four numbers is also 4. If the average of these seven numbers is 3, the fourth number is :

a. 3
b. 4
c. 7
d. 11 Out of four numbers, the average of first three is 16 and that of the last three is 15. If the last number is 18, the first number is :

a. 20
b. 21
c. 23
d. 25