Question
The average age of 26 smdents in a class is 15 years. If
teacher's age is included in it, then the average will increase by one. What is the teacher's age (in years)?Solution
ATQ,
Total age of 26 students = 15×26=390 Total age with teacher = 16×27=432 Teacher's age = 432−390=42 Final Answer: The teacher is 42 years old.
Which is not the function of the Operating System?
Aman bought a goat and a hen, with the goat's cost price being ₹1200 more than the hen's. He sold the hen at a 20% loss and the goat at a 25% profit, ...
10, 11, 7, 34, 18, 125
In the above given series, there is a wrong term. Find the 4th term of another series whose first term is the wrong number...
How many possible values can the digit 'k' take if the number 9458k2 is divisible by 8?
A sum of money becomes ₹7800 after 3 years and ₹8500 after 4 years at simple interest. What is the principal amount?
In a 1500-metre race, Arjun beats Bishnu by 600 metres, and Bishnu beats Chintu by 700 metres. How far will Arjun beat Chintu by ...
(78.03 + 116.98) ÷ 13.211 = 89.9 – 25.23% of ?
A trader buys a stock at an average price of Rs. 240 per share. He sells one-third of his shares at a 10% profit and the remainin...
Anuj invested a certain amount for 18 months at a simple interest rate of 5% per annum and received a total of Rs. 3,440. What wo...
The mean and standard deviation of 6 observations are 10 and 3 respectively. If each observation is multiplied by 4 and then 5 is added to each result, ...
Relevant for Exams:
