A committee of five members is to be formed out of 3 trainees, 4 professors and 6 research associates. In how many different ways this can be done if the committee should have all the 4 professors and 1 research associate or all 3 trainees and 2 professors

Which element is fifth to the left of the element which is ninth from the left end of the fourth step ?

Which element is exactly between ‘38’ and ‘required’ in the second step of the given input ?

What is the position of ‘markets’ from the left end in the first step ?

In which step are the elements ’72 today required 44’ found in the same order ?

Which among the given expressions indicate that J is the wife of F ?