Consider the statements given below and identify the correct answer.
A spherical mirror converges a beam of light, at a given point on the principal axis. Which of the following statement(s) about the mirror is are true?
A statement is given followed by two assumptions numbered I and II. You have to assume everything in the statement to be true and decide which of the given assumptions is/are implicit in the statement.
Statement:
Essay writing is an art. It requires an understanding of the subject as well as a command over the language to be able to write a good essay.
Assumptions:
I. Essays cannot be written without complete mastery over the subject.
II. Anyone with a good command over the language can write a good essay.
If '+' means '—', '—' means '÷', '÷' means '×' and '×' means '+', what will come in place of the question mark (?) in the following equation?
12 ÷ 6 + 28 - 7 × 14 = ?