1
GATE CSE 2022
Numerical
+1
-0.33

The number of arrangements of six identical balls in three identical bins is ___________.

2
GATE CSE 2015 Set 3
Numerical
+1
-0
The number of $$4$$ digit numbers having their digits in non-decreasing order (from left to right) constructed by using the digits belonging to the set $${1, 2, 3}$$ is____________.
3
GATE CSE 2012
+1
-0.3
The recurrence relation capturing the optional execution time of the Towers of Hanoi problem with $$n$$ discs is
A
$$T\left( n \right) = 2T\left( {n - 2} \right) + 2$$
B
$$T\left( n \right) = 2T\left( {n - 1} \right) + n$$
C
$$T\left( n \right) = 2T\left( {n/2} \right) + 1$$
D
$$T\left( n \right) = 2T\left( {n - 1} \right) + 1$$
4
GATE CSE 2004
+1
-0.3
In a class of 200 students, 125 students have taken Programming Language course, 85 students have taken Data Structures course, 65 student have taken Computer Organization coures; 50 students have taken both Programming Language and Data Structures, 35 students have taken both Programming Languages and Computer Organization; 30 students have taken both Data Structures and Computer Organization; 15 students have taken all the three course.

How many students have not taken any of the three courses?

A
15
B
20
C
25
D
35
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