The average age of 39 students of a class is 39 years. If the age of the teacher is also included, the average age of the whole group becomes 40 years. The age (in years) of the teacher is:
A81
B77
C79
D83
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
The average of first 126 odd natural numbers, is:
Mohan bought 52 books for Rs 1130 from one shop and 44 books for Rs 920 from another. What is the average price (in Rs) he paid per book ?
16.16 / 0.8 = ?
ഒരു സ്കൂളിലെ 15 അദ്ധ്യാപകരുടെ ശരാശരി പ്രായം 40 വയസ്സാണ്. അവരിൽ 55 വയസ്സുള്ള ഒരാൾപിരിഞ്ഞ് പോയി. പകരം 25 വയസ്സുള്ള ഒരാൾ വന്ന് ചേർന്നു. ഇപ്പോൾ അവരുടെ ശരാശരി പ്രായംഎന്ത്?
The sum of five numbers is 655. The average of the first two numbers is 75 and the third number is 107. Find the average of the remaining two numbers?