MCA Entrance Previous Year Question Bank

Of the three numbers, second is twice the first and is also thrice the third. If the average of three numbers is 44, the largest number is

If $A_1=\{3\}$, $A_2=\{5,7,9\}$, $A_3=\{11,13,15,17,19\}$, $A_4=\{21,23,25,27,29,31,33\}$ and so on, what is the average of the numbers of the set $A_{20}$?

Average age of students of an adult school is 40 yr. 120 new students whose average age is 32 yr joined the school. As a result the average age is decreased by 4 yr. The number of students of the school after joining of the new student is:

The average age of husband and wife was 22 years when they were married five years back. What is the present average age of the family if they have a three year old child?

A car completes the first half of its journey with a velocity $v_1$ and the rest half with a velocity $v_2$. Then, the average velocity of the car for the whole journey is:

The average marks per student in a class of $30$ students were $45$. On rechecking it was found that marks had been entered wrongly in two cases. After correction these marks were increased by $24$ and $34$ in the two cases. The corrected average marks per student are:

In a certain school, the number of students in each section was $24$. After admitting some students, three new sections have been started and now there are $16$ sections with $21$ students in each. What is the number of newly admitted students?

The average marks of boys in a class is $52$ and that of girls is $42$. The average marks of boys and girls combined is $50$. The percentage of boys in the class is:

Let S be the set of integers x such that i. 100 ≤ x ≤ 200 ii. x is odd and iii. x is divisible by 3 but not by 7 How many elements does S contain?

A set of consecutive positive integers beginning with 1 is written on the blackboard. A student came along and erased one number. The average of the remaining numbers is $35\frac{7}{17}$. What was the number erased?