Ques:- The average age of 12 students is 20 years. If the age of one more student is included, the average decreases by 1. What is the age of the new student?
A. 5 years
B. 6 years
C. 7 years
D. 9 years
Ques:- A clock takes 9 seconds to strike 4 times. In order to strike 12 times at the same rate, the time taken is
A. 27 seconds
B. 29 seconds
C. 33 seconds
D. 36 seconds