Average MCQs

516 questionsArithmetic-AbilityPage 44 of 58

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Question 388easy
The average age of 40 students of class is 18 years. When 20 new students are admitted to the same class, the average age of the students of the class is increased by 6 months. The average age of newly admitted students is ?
Question 389easy
The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg.)
Question 390easy
Five years ago, the average age of P and Q was 25. The average age of P, Q and R today is 25. Age of R after 5 years will be :
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Question 391easy
If the mean of 4 observations is 20, when a constant 'c' is added to each observation, the mean becomes 22. The value of c is :
Question 392easy
The average age of 30 students is 9 years. If the age of their teacher is included, the average age becomes 10 years. The age of the teacher (in years) is :
Question 393easy
The average age of 20 boys in a class is 12 years. 5 new boys are admitted to the class whose average age is 7 years. The average age of all the boys in the class becomes:
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Question 394easy
The frequency distribution data is given below. If the average age is 17 years, the value of m is Age (in years) : 8 20 26 29 No. of people : 3 2 m 1
Question 395easy
The average of six numbers is 3.95. The average of two of them is 3.4, while the average of the other two is 3.85. The average of the remaining two numbers is :
Question 396easy
If the arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is :
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