Class 11 के Champion बनेंगे आप ? ?Student of the Month ? Pooja Mam ,Lokendra Sir and Amit Sir ?

There are 6 boys in a class of 11 students. A student is chosen from the class at random to be made the class monitor. What is the probability that the class monitor is a girl? एक 11 छात्रों की कक्षा में 6 लड़के हैं | किसी एक विद्यार्थी को छात्रनायक चुना गया है | छात्रनायक के लड़की होने की क्या सम्भावना है ?

The average age of 30 students of a class is 14 years 4 months. After admission of 5 new student in the class the average becomes 13 years 9 months. The youngest one of the five new students is 9 years 11 months old. The average age of the remaining 4 new students is :

There are 48 students in a class with the age of one of the students being twice that of the age of another. If these two students are replaced by two others whose ages are 16 years and 11 years respectively, the average age of the class increases by 1.5 month. Find the age of the younger of the two students.