The average age of 20 students is 21 years.If the class teacher's age is included,the average age is increased by one.What is the age of class teacher?
Reveal answer
Fill a bubble to check yourself
Keep practicing — related questions
- The average age of a class of 25 students is 16. The average age of the class including a teacher is 18. Wh...
- How many of the following numbers are divisible by 132 ?264, 396, 462, 792, 968, 2178, 5184, 6336
- How many of the following numbers are divisible by 132 ?264, 396, 462, 792, 968, 2178, 5184, 6336
- An accurate clock shows 8 o'clock in the morning. Through how may degrees will the hour hand rotate when th...
- It was Sunday on Jan 1, 2006. What was the day of the week Jan 1, 2010?
- Other things held constant, the value of an option depends on the stock's price, the risk-free rate, and the
- A father said to his son, "I was as old as you are at the present at the time of your birth". If the father...
- A company has just issued $5 million of mandatory redeemable preferred shares with a par value of $100 per ...