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What is the probability that a student who knows R also knows at least one of the other two languages? Compute three digits after the decimal point.

If a startup receives a negative evaluation, what is the probability that it will not be successful? Provide six digits after the decimal point.

A factory produces metal rods whose weights (in pounds) are independent and identically distributed random variables with mean μ = 5 and standard deviation σ = 0.2. The rods are packaged in boxes of 30. Show your work on the scratch paper answering Q16-Q17.

A graduate-level statistics class surveyed 120 students on their knowledge of three software tools: R, Python, and MATLAB. 65 students know R 75 students know Python 50 students know MATLAB 30 students know both R and Python 25 students know both R and MATLAB 35 students know both Python and MATLAB 15 students know all three languages Show your work on the scratch paper when answering Q1-Q3.

What is the advantage of the code on the top compared to the one on the bottom. (Note: BalanceException is a checked exception)   int withdraw(int amount) {   if (amount > balance)       return -1;   else {       balance -= amount;        return 0;   } }   void withdraw(int amount) throws BalanceException{  if (amount > balance){        throw new BalanceException();   }   balance -= amount; }  

Why is deep inheritance problematic?

Does this code compile? Does it produce a compilation warning? Does it produce a runtime error? Explain the behavior and the reason behind it.   public static void func(Number arr[]){       arr[0] = 5.0;      } public static void main(String [] args) {     Integer arr[] = new Integer[100];     func(arr); }

Following Type Eraser, how does the code below look like?                  Before: class GeometricObject {  public double getArea() {return 1.0;}  } public static boolean  equalArea(E object1, E object2)  {     return object1.getArea() ==  object2.getArea(); }                  After: ?

Given two objects a and b such that a.equals(b) is true. Should a.hashCode() and b.hashCode() be also equal? Justify your answer. Yes No Justification:

Given the class hierarchy below. Could the symmetry of equals() be violated? If yes, provide client code that demonstrates that.   class A {   int x;   public A(int x) {this.x = x;}   public boolean equals(Object o) {        if (!(o instanceof A)) return false;        A a = (A)o;        return this.x == a.x;   }        } class B extends A {   int y;   public B(int x, int y) {super(x); this.y = y;} }