The average of four girls' age is 12 years. The ages of three of them are 7, 12 and 13 years. Find the age of the fourth girl.
A16 years
B14 years
C17 years
D15 years
A16 years
B14 years
C17 years
D15 years
Related Questions:
Eight people are sitting in two parallel rows containing 4 people each in such a way that there is equal distance between adjacent persons.
In row 1, D, A, N and S are seated and all of them are facing south.
In row 2, M, O, R and K are seated and all of them are facing north.
Thus, each person faces another person from the other row.
No one sits to the right of K. Only two people sit between R and K. The one facing O sits second to the right of the one facing K. A sits to the immediate right of S. N sits to the immediate right of A and does not face O. Which of the following represents both people facing each other?